856858407453 has 12 divisors (see below), whose sum is σ = 1237910663808. Its totient is φ = 571134493320.

The previous prime is 856858407421. The next prime is 856858407467. The reversal of 856858407453 is 354704858658.

856858407453 is a `hidden beast` number, since 8 + 5 + 6 + 8 + 584 + 0 + 7 + 45 + 3 = 666.

856858407453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856858407453 - 2⁵ = 856858407421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856858407253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8651775 + ... + 8750252.

It is an arithmetic number, because the mean of its divisors is an integer number (103159221984).

Almost surely, 2^856858407453 is an apocalyptic number.

It is an amenable number.

856858407453 is a deficient number, since it is larger than the sum of its proper divisors (381052256355).

856858407453 is a wasteful number, since it uses less digits than its factorization.

856858407453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17407504 (or 17407501 counting only the distinct ones).

The product of its (nonzero) digits is 129024000, while the sum is 63.

The spelling of 856858407453 in words is "eight hundred fifty-six billion, eight hundred fifty-eight million, four hundred seven thousand, four hundred fifty-three".