551977545779155 has 8 divisors (see below), whose sum is σ = 669815448811200. Its totient is φ = 436620440705856.

The previous prime is 551977545779137. The next prime is 551977545779161.

551977545779155 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551977545779155 - 2¹⁷ = 551977545648083 is a prime.

It is a super-2 number, since 2×551977545779155² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620199489195 + ... + 620199490084.

It is an arithmetic number, because the mean of its divisors is an integer number (83726931101400).

Almost surely, 2^{551977545779155} is an apocalyptic number.

551977545779155 is a deficient number, since it is larger than the sum of its proper divisors (117837903032045).

551977545779155 is a wasteful number, since it uses less digits than its factorization.

551977545779155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240398979373.

The product of its digits is 12155062500, while the sum is 82.

The spelling of 551977545779155 in words is "five hundred fifty-one trillion, nine hundred seventy-seven billion, five hundred forty-five million, seven hundred seventy-nine thousand, one hundred fifty-five".