71256226605523 has 16 divisors (see below), whose sum is σ = 71571630122496. Its totient is φ = 70941553591680.

The previous prime is 71256226605521. The next prime is 71256226605547. The reversal of 71256226605523 is 32550662265217.

It is a cyclic number.

It is not a de Polignac number, because 71256226605523 - 2¹ = 71256226605521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71256226605521) 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, 2433017986 + ... + 2433047272.

It is an arithmetic number, because the mean of its divisors is an integer number (4473226882656).

Almost surely, 2^{71256226605523} is an apocalyptic number.

71256226605523 is a deficient number, since it is larger than the sum of its proper divisors (315403516973).

71256226605523 is a wasteful number, since it uses less digits than its factorization.

71256226605523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41394.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 71256226605523 in words is "seventy-one trillion, two hundred fifty-six billion, two hundred twenty-six million, six hundred five thousand, five hundred twenty-three".