551785587155 has 16 divisors (see below), whose sum is σ = 764827938144. Its totient is φ = 377692807680.

The previous prime is 551785587097. The next prime is 551785587187.

551785587155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551785587155 - 2¹⁸ = 551785325011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295071572 + ... + 295073441.

It is an arithmetic number, because the mean of its divisors is an integer number (47801746134).

Almost surely, 2^551785587155 is an apocalyptic number.

551785587155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

551785587155 is a deficient number, since it is larger than the sum of its proper divisors (213042350989).

551785587155 is a wasteful number, since it uses less digits than its factorization.

551785587155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590145046.

The product of its digits is 49000000, while the sum is 62.

The spelling of 551785587155 in words is "five hundred fifty-one billion, seven hundred eighty-five million, five hundred eighty-seven thousand, one hundred fifty-five".