64216425240 has 384 divisors, whose sum is σ = 238685875200. Its totient is φ = 15230165760.

The previous prime is 64216425227. The next prime is 64216425337. The reversal of 64216425240 is 4252461246.

64216425240 is a `hidden beast` number, since 6 + 4 + 2 + 1 + 642 + 5 + 2 + 4 + 0 = 666.

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 = 64216425195 and 64216425204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26241697 + ... + 26244143.

It is an arithmetic number, because the mean of its divisors is an integer number (621577800).

Almost surely, 2^64216425240 is an apocalyptic number.

64216425240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64216425240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119342937600).

64216425240 is an abundant number, since it is smaller than the sum of its proper divisors (174469449960).

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

64216425240 is a wasteful number, since it uses less digits than its factorization.

64216425240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572 (or 2515 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

Adding to 64216425240 its reverse (4252461246), we get a palindrome (68468886486).

The spelling of 64216425240 in words is "sixty-four billion, two hundred sixteen million, four hundred twenty-five thousand, two hundred forty".