23556554550 has 72 divisors (see below), whose sum is σ = 64760491224. Its totient is φ = 6135655680.

The previous prime is 23556554503. The next prime is 23556554561. The reversal of 23556554550 is 5545565532.

23556554550 is a `hidden beast` number, since 2 + 3 + 5 + 56 + 5 + 545 + 50 = 666.

It is a super-2 number, since 2×23556554550² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 23556554496 and 23556554505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 589347 + ... + 628046.

It is an arithmetic number, because the mean of its divisors is an integer number (899451267).

Almost surely, 2^23556554550 is an apocalyptic number.

23556554550 is an abundant number, since it is smaller than the sum of its proper divisors (41203936674).

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

23556554550 is a wasteful number, since it uses less digits than its factorization.

23556554550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217454 (or 1217446 counting only the distinct ones).

The product of its (nonzero) digits is 2250000, while the sum is 45.

The spelling of 23556554550 in words is "twenty-three billion, five hundred fifty-six million, five hundred fifty-four thousand, five hundred fifty".