215858857008 has 80 divisors (see below), whose sum is σ = 616108709376. Its totient is φ = 64776053760.

The previous prime is 215858857003. The next prime is 215858857009. The reversal of 215858857008 is 800758858512.

It is a super-2 number, since 2×215858857008² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215858857003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5731948 + ... + 5769483.

Almost surely, 2^215858857008 is an apocalyptic number.

It is an amenable number.

215858857008 is an abundant number, since it is smaller than the sum of its proper divisors (400249852368).

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

215858857008 is a wasteful number, since it uses less digits than its factorization.

215858857008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11501482 (or 11501476 counting only the distinct ones).

The product of its (nonzero) digits is 7168000, while the sum is 57.

The spelling of 215858857008 in words is "two hundred fifteen billion, eight hundred fifty-eight million, eight hundred fifty-seven thousand, eight".