656354254663542 has 16 divisors (see below), whose sum is σ = 1324751706661680. Its totient is φ = 216777551998752.

The previous prime is 656354254663483. The next prime is 656354254663559. The reversal of 656354254663542 is 245366452453656.

It is a super-2 number, since 2×656354254663542² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501799888233 + ... + 501799889540.

It is an arithmetic number, because the mean of its divisors is an integer number (82796981666355).

Almost surely, 2^{656354254663542} is an apocalyptic number.

656354254663542 is an abundant number, since it is smaller than the sum of its proper divisors (668397451998138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656354254663542 is a wasteful number, since it uses less digits than its factorization.

656354254663542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003599777887.

The product of its digits is 1866240000, while the sum is 66.

The spelling of 656354254663542 in words is "six hundred fifty-six trillion, three hundred fifty-four billion, two hundred fifty-four million, six hundred sixty-three thousand, five hundred forty-two".