551556389955 has 8 divisors (see below), whose sum is σ = 882490223952. Its totient is φ = 294163407968.

The previous prime is 551556389929. The next prime is 551556389999. The reversal of 551556389955 is 559983655155.

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 551556389955 - 2⁷ = 551556389827 is a prime.

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, 18385212984 + ... + 18385213013.

It is an arithmetic number, because the mean of its divisors is an integer number (110311277994).

Almost surely, 2^551556389955 is an apocalyptic number.

551556389955 is a deficient number, since it is larger than the sum of its proper divisors (330933833997).

551556389955 is a wasteful number, since it uses less digits than its factorization.

551556389955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36770426005.

The product of its digits is 182250000, while the sum is 66.

The spelling of 551556389955 in words is "five hundred fifty-one billion, five hundred fifty-six million, three hundred eighty-nine thousand, nine hundred fifty-five".