656545454 has 4 divisors (see below), whose sum is σ = 984818184. Its totient is φ = 328272726.

The previous prime is 656545453. The next prime is 656545523. The reversal of 656545454 is 454545656.

656545454 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×656545454² = 862103866336132232, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656545453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164136362 + ... + 164136365.

It is an arithmetic number, because the mean of its divisors is an integer number (246204546).

Almost surely, 2^656545454 is an apocalyptic number.

656545454 is a deficient number, since it is larger than the sum of its proper divisors (328272730).

656545454 is a wasteful number, since it uses less digits than its factorization.

656545454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328272729.

The product of its digits is 1440000, while the sum is 44.

The square root of 656545454 is about 25623.1429375867. The cubic root of 656545454 is about 869.1370551124.

The spelling of 656545454 in words is "six hundred fifty-six million, five hundred forty-five thousand, four hundred fifty-four".