764815136398 has 16 divisors (see below), whose sum is σ = 1149813248976. Its totient is φ = 381544986240.

The previous prime is 764815136269. The next prime is 764815136399. The reversal of 764815136398 is 893631518467.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764815136399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414038 + ... + 1878598.

It is an arithmetic number, because the mean of its divisors is an integer number (71863328061).

Almost surely, 2^764815136398 is an apocalyptic number.

764815136398 is a deficient number, since it is larger than the sum of its proper divisors (384998112578).

764815136398 is a wasteful number, since it uses less digits than its factorization.

764815136398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466419.

The product of its digits is 26127360, while the sum is 61.

The spelling of 764815136398 in words is "seven hundred sixty-four billion, eight hundred fifteen million, one hundred thirty-six thousand, three hundred ninety-eight".