856959407645 has 32 divisors (see below), whose sum is σ = 1126304300160. Its totient is φ = 620763040000.

The previous prime is 856959407639. The next prime is 856959407651. The reversal of 856959407645 is 546704959658.

856959407645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856959407639) and next prime (856959407651).

It is not a de Polignac number, because 856959407645 - 2⁸ = 856959407389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108458195 + ... + 108466095.

It is an arithmetic number, because the mean of its divisors is an integer number (35197009380).

Almost surely, 2^856959407645 is an apocalyptic number.

It is an amenable number.

856959407645 is a deficient number, since it is larger than the sum of its proper divisors (269344892515).

856959407645 is a wasteful number, since it uses less digits than its factorization.

856959407645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15517.

The product of its (nonzero) digits is 326592000, while the sum is 68.

The spelling of 856959407645 in words is "eight hundred fifty-six billion, nine hundred fifty-nine million, four hundred seven thousand, six hundred forty-five".