797775655 has 4 divisors (see below), whose sum is σ = 957330792. Its totient is φ = 638220520.

The previous prime is 797775653. The next prime is 797775659. The reversal of 797775655 is 556577797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556577797 = 379 ⋅1468543.

It is not a de Polignac number, because 797775655 - 2¹ = 797775653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 797775655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797775653) 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 3 ways as a sum of consecutive naturals, for example, 79777561 + ... + 79777570.

It is an arithmetic number, because the mean of its divisors is an integer number (239332698).

Almost surely, 2^797775655 is an apocalyptic number.

797775655 is a deficient number, since it is larger than the sum of its proper divisors (159555137).

797775655 is a wasteful number, since it uses less digits than its factorization.

797775655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159555136.

The product of its digits is 16206750, while the sum is 58.

The square root of 797775655 is about 28244.9226410695. The cubic root of 797775655 is about 927.4565935082.

The spelling of 797775655 in words is "seven hundred ninety-seven million, seven hundred seventy-five thousand, six hundred fifty-five".