771132638805 has 32 divisors (see below), whose sum is σ = 1287512319744. Its totient is φ = 393372266496.

The previous prime is 771132638791. The next prime is 771132638831. The reversal of 771132638805 is 508836231177.

It is not a de Polignac number, because 771132638805 - 2⁷ = 771132638677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12754507 + ... + 12814823.

It is an arithmetic number, because the mean of its divisors is an integer number (40234759992).

Almost surely, 2^771132638805 is an apocalyptic number.

It is an amenable number.

771132638805 is a deficient number, since it is larger than the sum of its proper divisors (516379680939).

771132638805 is a wasteful number, since it uses less digits than its factorization.

771132638805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97405.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 771132638805 in words is "seven hundred seventy-one billion, one hundred thirty-two million, six hundred thirty-eight thousand, eight hundred five".