215492632902 has 64 divisors (see below), whose sum is σ = 488027229120. Its totient is φ = 70458336000.

The previous prime is 215492632819. The next prime is 215492632903. The reversal of 215492632902 is 209236294512.

215492632902 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 9 + 2 + 632 + 9 + 0 + 2 = 666.

It is a super-2 number, since 2×215492632902² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215492632903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17512152 + ... + 17524452.

It is an arithmetic number, because the mean of its divisors is an integer number (7625425455).

Almost surely, 2^215492632902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215492632902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244013614560).

215492632902 is an abundant number, since it is smaller than the sum of its proper divisors (272534596218).

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

215492632902 is a wasteful number, since it uses less digits than its factorization.

215492632902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18486 (or 18480 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 215492632902 in words is "two hundred fifteen billion, four hundred ninety-two million, six hundred thirty-two thousand, nine hundred two".