656023545553 has 4 divisors (see below), whose sum is σ = 656442196480. Its totient is φ = 655604894628.

The previous prime is 656023545539. The next prime is 656023545557. The reversal of 656023545553 is 355545320656.

656023545553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656023545553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656023545497 and 656023545506.

It is not an unprimeable number, because it can be changed into a prime (656023545557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209323113 + ... + 209326246.

It is an arithmetic number, because the mean of its divisors is an integer number (164110549120).

Almost surely, 2^656023545553 is an apocalyptic number.

It is an amenable number.

656023545553 is a deficient number, since it is larger than the sum of its proper divisors (418650927).

656023545553 is a wasteful number, since it uses less digits than its factorization.

656023545553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418650926.

The product of its (nonzero) digits is 8100000, while the sum is 49.

The spelling of 656023545553 in words is "six hundred fifty-six billion, twenty-three million, five hundred forty-five thousand, five hundred fifty-three".