7764065842 has 12 divisors (see below), whose sum is σ = 12610864890. Its totient is φ = 3583414848.

The previous prime is 7764065821. The next prime is 7764065849. The reversal of 7764065842 is 2485604677.

It can be written as a sum of positive squares in 3 ways, for example, as 4126649121 + 3637416721 = 64239^2 + 60311^2 .

It is a super-2 number, since 2×7764065842² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7764065849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11484967 + ... + 11485642.

Almost surely, 2^7764065842 is an apocalyptic number.

7764065842 is a deficient number, since it is larger than the sum of its proper divisors (4846799048).

7764065842 is a wasteful number, since it uses less digits than its factorization.

7764065842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22970637 (or 22970624 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 49.

The square root of 7764065842 is about 88113.9367069705. The cubic root of 7764065842 is about 1980.1423087526.

The spelling of 7764065842 in words is "seven billion, seven hundred sixty-four million, sixty-five thousand, eight hundred forty-two".