551638525836155 has 32 divisors (see below), whose sum is σ = 687157232025600. Its totient is φ = 424676843164800.

The previous prime is 551638525836121. The next prime is 551638525836257.

551638525836155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551638525836155 - 2¹⁸ = 551638525574011 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1027989206 + ... + 1028525684.

It is an arithmetic number, because the mean of its divisors is an integer number (21473663500800).

Almost surely, 2^{551638525836155} is an apocalyptic number.

551638525836155 is a deficient number, since it is larger than the sum of its proper divisors (135518706189445).

551638525836155 is a wasteful number, since it uses less digits than its factorization.

551638525836155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573755.

The product of its digits is 648000000, while the sum is 68.

The spelling of 551638525836155 in words is "five hundred fifty-one trillion, six hundred thirty-eight billion, five hundred twenty-five million, eight hundred thirty-six thousand, one hundred fifty-five".