551810018156 has 12 divisors (see below), whose sum is σ = 966655939368. Its totient is φ = 275622606912.

The previous prime is 551810018153. The next prime is 551810018167. The reversal of 551810018156 is 651810018155.

It is a super-2 number, since 2×551810018156² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (551810018153) 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, 70596146 + ... + 70603961.

It is an arithmetic number, because the mean of its divisors is an integer number (80554661614).

Almost surely, 2^551810018156 is an apocalyptic number.

It is an amenable number.

551810018156 is a deficient number, since it is larger than the sum of its proper divisors (414845921212).

551810018156 is a wasteful number, since it uses less digits than its factorization.

551810018156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141201088 (or 141201086 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 41.

Subtracting 551810018156 from its reverse (651810018155), we obtain a palindrome (99999999999).

The spelling of 551810018156 in words is "five hundred fifty-one billion, eight hundred ten million, eighteen thousand, one hundred fifty-six".