551810018155 has 32 divisors (see below), whose sum is σ = 724256805888. Its totient is φ = 400268668800.

The previous prime is 551810018153. The next prime is 551810018167.

551810018155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551810018155 - 2¹ = 551810018153 is a prime.

It is a super-2 number, since 2×551810018155² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551810018153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91858162 + ... + 91864168.

It is an arithmetic number, because the mean of its divisors is an integer number (22633025184).

Almost surely, 2^551810018155 is an apocalyptic number.

551810018155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551810018155 is a deficient number, since it is larger than the sum of its proper divisors (172446787733).

551810018155 is a wasteful number, since it uses less digits than its factorization.

551810018155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10107.

The product of its (nonzero) digits is 40000, while the sum is 40.

The spelling of 551810018155 in words is "five hundred fifty-one billion, eight hundred ten million, eighteen thousand, one hundred fifty-five".