5155532640 has 144 divisors (see below), whose sum is σ = 18068935248. Its totient is φ = 1337637888.

The previous prime is 5155532617. The next prime is 5155532663. The reversal of 5155532640 is 462355515.

5155532640 is a `hidden beast` number, since 5 + 1 + 5 + 5 + 5 + 3 + 2 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (5155532617) and next prime (5155532663).

It is a tau number, because it is divible by the number of its divisors (144).

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 = 5155532595 and 5155532604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4899 + ... + 101661.

It is an arithmetic number, because the mean of its divisors is an integer number (125478717).

Almost surely, 2^5155532640 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 5155532640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9034467624).

5155532640 is an abundant number, since it is smaller than the sum of its proper divisors (12913402608).

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

5155532640 is a wasteful number, since it uses less digits than its factorization.

5155532640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96821 (or 96810 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 5155532640 is about 71802.0378540888. The cubic root of 5155532640 is about 1727.5256864342.

The spelling of 5155532640 in words is "five billion, one hundred fifty-five million, five hundred thirty-two thousand, six hundred forty".