42656521775 has 24 divisors (see below), whose sum is σ = 60647368320. Its totient is φ = 29154872160.

The previous prime is 42656521697. The next prime is 42656521783. The reversal of 42656521775 is 57712565624.

It is not a de Polignac number, because 42656521775 - 2⁸ = 42656521519 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343265 + ... + 450714.

It is an arithmetic number, because the mean of its divisors is an integer number (2526973680).

Almost surely, 2^42656521775 is an apocalyptic number.

42656521775 is a deficient number, since it is larger than the sum of its proper divisors (17990846545).

42656521775 is a wasteful number, since it uses less digits than its factorization.

42656521775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794303 (or 794298 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 50.

The spelling of 42656521775 in words is "forty-two billion, six hundred fifty-six million, five hundred twenty-one thousand, seven hundred seventy-five".