779405552855 has 4 divisors (see below), whose sum is σ = 935286663432. Its totient is φ = 623524442280.

The previous prime is 779405552839. The next prime is 779405552881. The reversal of 779405552855 is 558255504977.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 779405552855 - 2⁴ = 779405552839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77940555281 + ... + 77940555290.

It is an arithmetic number, because the mean of its divisors is an integer number (233821665858).

Almost surely, 2^779405552855 is an apocalyptic number.

779405552855 is a deficient number, since it is larger than the sum of its proper divisors (155881110577).

779405552855 is a wasteful number, since it uses less digits than its factorization.

779405552855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155881110576.

The product of its (nonzero) digits is 88200000, while the sum is 62.

The spelling of 779405552855 in words is "seven hundred seventy-nine billion, four hundred five million, five hundred fifty-two thousand, eight hundred fifty-five".