770138770764 has 96 divisors (see below), whose sum is σ = 2015185084416. Its totient is φ = 226859374080.

The previous prime is 770138770757. The next prime is 770138770769. The reversal of 770138770764 is 467077831077.

It is a super-2 number, since 2×770138770764² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (770138770769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5285877 + ... + 5429619.

It is an arithmetic number, because the mean of its divisors is an integer number (20991511296).

Almost surely, 2^770138770764 is an apocalyptic number.

770138770764 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 770138770764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007592542208).

770138770764 is an abundant number, since it is smaller than the sum of its proper divisors (1245046313652).

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

770138770764 is a wasteful number, since it uses less digits than its factorization.

770138770764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144895 (or 144893 counting only the distinct ones).

The product of its (nonzero) digits is 9680832, while the sum is 57.

The spelling of 770138770764 in words is "seven hundred seventy billion, one hundred thirty-eight million, seven hundred seventy thousand, seven hundred sixty-four".