855970937640 has 640 divisors, whose sum is σ = 3585859200000. Its totient is φ = 178309527552.

The previous prime is 855970937621. The next prime is 855970937651. The reversal of 855970937640 is 46739079558.

855970937640 is a `hidden beast` number, since 8 + 5 + 597 + 0 + 9 + 37 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 23273986 + ... + 23310734.

It is an arithmetic number, because the mean of its divisors is an integer number (5602905000).

Almost surely, 2^855970937640 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 855970937640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792929600000).

855970937640 is an abundant number, since it is smaller than the sum of its proper divisors (2729888262360).

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

855970937640 is a wasteful number, since it uses less digits than its factorization.

855970937640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36871 (or 36858 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 855970937640 in words is "eight hundred fifty-five billion, nine hundred seventy million, nine hundred thirty-seven thousand, six hundred forty".