771795136 has 112 divisors (see below), whose sum is σ = 1819363392. Its totient is φ = 317952000.

The previous prime is 771795133. The next prime is 771795139. The reversal of 771795136 is 631597177.

It is an interprime number because it is at equal distance from previous prime (771795133) and next prime (771795139).

It is a tau number, because it is divible by the number of its divisors (112).

It is not an unprimeable number, because it can be changed into a prime (771795133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1673946 + ... + 1674406.

It is an arithmetic number, because the mean of its divisors is an integer number (16244316).

Almost surely, 2^771795136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771795136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909681696).

771795136 is an abundant number, since it is smaller than the sum of its proper divisors (1047568256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771795136 is a wasteful number, since it uses less digits than its factorization.

771795136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 608 counting only the distinct ones).

The product of its digits is 277830, while the sum is 46.

The square root of 771795136 is about 27781.2011259413. The cubic root of 771795136 is about 917.2773696780.

The spelling of 771795136 in words is "seven hundred seventy-one million, seven hundred ninety-five thousand, one hundred thirty-six".