551589985155 has 64 divisors (see below), whose sum is σ = 1019742276096. Its totient is φ = 251623680000.

The previous prime is 551589985147. The next prime is 551589985171.

551589985155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551589985155 - 2³ = 551589985147 is a prime.

It is a super-3 number, since 3×551589985155³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9004380 + ... + 9065430.

It is an arithmetic number, because the mean of its divisors is an integer number (15933473064).

Almost surely, 2^551589985155 is an apocalyptic number.

551589985155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551589985155 is a deficient number, since it is larger than the sum of its proper divisors (468152290941).

551589985155 is a wasteful number, since it uses less digits than its factorization.

551589985155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64308.

The product of its digits is 81000000, while the sum is 66.

The spelling of 551589985155 in words is "five hundred fifty-one billion, five hundred eighty-nine million, nine hundred eighty-five thousand, one hundred fifty-five".