767957985 has 12 divisors (see below), whose sum is σ = 1331127252. Its totient is φ = 409577568.

The previous prime is 767957933. The next prime is 767957987. The reversal of 767957985 is 589759767.

It can be written as a sum of positive squares in 2 ways, for example, as 453817809 + 314140176 = 21303^2 + 17724^2 .

It is not a de Polignac number, because 767957985 - 2⁷ = 767957857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (767957987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8532822 + ... + 8532911.

It is an arithmetic number, because the mean of its divisors is an integer number (110927271).

Almost surely, 2^767957985 is an apocalyptic number.

It is an amenable number.

767957985 is a deficient number, since it is larger than the sum of its proper divisors (563169267).

767957985 is a wasteful number, since it uses less digits than its factorization.

767957985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17065744 (or 17065741 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 63.

The square root of 767957985 is about 27712.0548678729. The cubic root of 767957985 is about 915.7546940267.

The spelling of 767957985 in words is "seven hundred sixty-seven million, nine hundred fifty-seven thousand, nine hundred eighty-five".