799561555 has 16 divisors (see below), whose sum is σ = 1034115264. Its totient is φ = 589968000.

The previous prime is 799561549. The next prime is 799561559. The reversal of 799561555 is 555165997.

It is not a de Polignac number, because 799561555 - 2¹⁵ = 799528787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (799561559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89805 + ... + 98305.

It is an arithmetic number, because the mean of its divisors is an integer number (64632204).

Almost surely, 2^799561555 is an apocalyptic number.

799561555 is a deficient number, since it is larger than the sum of its proper divisors (234553709).

799561555 is a wasteful number, since it uses less digits than its factorization.

799561555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9966.

The product of its digits is 2126250, while the sum is 52.

The square root of 799561555 is about 28276.5194994009. The cubic root of 799561555 is about 928.1481456135.

The spelling of 799561555 in words is "seven hundred ninety-nine million, five hundred sixty-one thousand, five hundred fifty-five".