5321640018240 has 672 divisors, whose sum is σ = 23255030163456. Its totient is φ = 1086586306560.

The previous prime is 5321640018203. The next prime is 5321640018257. The reversal of 5321640018240 is 428100461235.

It is a happy number.

5321640018240 is a `hidden beast` number, since 5 + 3 + 2 + 1 + 6 + 400 + 1 + 8 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5321640018195 and 5321640018204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7796974 + ... + 8451986.

It is an arithmetic number, because the mean of its divisors is an integer number (34605699648).

Almost surely, 2^{5321640018240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5321640018240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11627515081728).

5321640018240 is an abundant number, since it is smaller than the sum of its proper divisors (17933390145216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5321640018240 is a wasteful number, since it uses less digits than its factorization.

5321640018240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655087 (or 655074 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 5321640018240 its reverse (428100461235), we get a palindrome (5749740479475).

The spelling of 5321640018240 in words is "five trillion, three hundred twenty-one billion, six hundred forty million, eighteen thousand, two hundred forty".