5215155660 has 432 divisors, whose sum is σ = 19007325792. Its totient is φ = 1149603840.

The previous prime is 5215155629. The next prime is 5215155709. The reversal of 5215155660 is 665515125.

5215155660 is a `hidden beast` number, since 52 + 1 + 51 + 556 + 6 + 0 = 666.

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

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 143 ways as a sum of consecutive naturals, for example, 31994739 + ... + 31994901.

Almost surely, 2^5215155660 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 5215155660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9503662896).

5215155660 is an abundant number, since it is smaller than the sum of its proper divisors (13792170132).

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

5215155660 is a wasteful number, since it uses less digits than its factorization.

5215155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 5215155660 is about 72216.0346460535. The cubic root of 5215155660 is about 1734.1597095904.

The spelling of 5215155660 in words is "five billion, two hundred fifteen million, one hundred fifty-five thousand, six hundred sixty".