551100123656 has 16 divisors (see below), whose sum is σ = 1036239968700. Its totient is φ = 274769465344.

The previous prime is 551100123647. The next prime is 551100123697. The reversal of 551100123656 is 656321001155.

It can be written as a sum of positive squares in 2 ways, for example, as 547407616900 + 3692506756 = 739870^2 + 60766^2 .

It is a super-2 number, since 2×551100123656² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97571561 + ... + 97577208.

Almost surely, 2^551100123656 is an apocalyptic number.

It is an amenable number.

551100123656 is a deficient number, since it is larger than the sum of its proper divisors (485139845044).

551100123656 is a wasteful number, since it uses less digits than its factorization.

551100123656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195149128 (or 195149124 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 551100123656 in words is "five hundred fifty-one billion, one hundred million, one hundred twenty-three thousand, six hundred fifty-six".