856503012023 has 16 divisors (see below), whose sum is σ = 919641431520. Its totient is φ = 794843713536.

The previous prime is 856503012019. The next prime is 856503012031. The reversal of 856503012023 is 320210305658.

It is not a de Polignac number, because 856503012023 - 2² = 856503012019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856503012523) 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, 521861 + ... + 1409022.

It is an arithmetic number, because the mean of its divisors is an integer number (57477589470).

Almost surely, 2^856503012023 is an apocalyptic number.

856503012023 is a deficient number, since it is larger than the sum of its proper divisors (63138419497).

856503012023 is a wasteful number, since it uses less digits than its factorization.

856503012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931266.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 856503012023 in words is "eight hundred fifty-six billion, five hundred three million, twelve thousand, twenty-three".