656565654545454 has 32 divisors (see below), whose sum is σ = 1358722336741920. Its totient is φ = 211260165103232.

The previous prime is 656565654545443. The next prime is 656565654545459. The reversal of 656565654545454 is 454545456565656.

It is a happy number.

656565654545454 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a super-2 number, since 2×656565654545454² (a number of 30 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

656565654545454 is a modest number, since divided by 54545454 gives 6565656 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656565654545459) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430678137 + ... + 432199940.

It is an arithmetic number, because the mean of its divisors is an integer number (42460073023185).

Almost surely, 2^{656565654545454} is an apocalyptic number.

656565654545454 is an abundant number, since it is smaller than the sum of its proper divisors (702156682196466).

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

656565654545454 is a wasteful number, since it uses less digits than its factorization.

656565654545454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862882484.

The product of its digits is 25920000000, while the sum is 75.

The spelling of 656565654545454 in words is "six hundred fifty-six trillion, five hundred sixty-five billion, six hundred fifty-four million, five hundred forty-five thousand, four hundred fifty-four".