764591616 has 320 divisors, whose sum is σ = 2474841600. Its totient is φ = 232243200.

The previous prime is 764591593. The next prime is 764591623. The reversal of 764591616 is 616195467.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10768861 + ... + 10768931.

It is an arithmetic number, because the mean of its divisors is an integer number (7733880).

Almost surely, 2^764591616 is an apocalyptic number.

764591616 is a gapful number since it is divisible by the number (76) 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 764591616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237420800).

764591616 is an abundant number, since it is smaller than the sum of its proper divisors (1710249984).

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

764591616 is a wasteful number, since it uses less digits than its factorization.

764591616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 136 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 764591616 is about 27651.2498090050. The cubic root of 764591616 is about 914.4146538389.

The spelling of 764591616 in words is "seven hundred sixty-four million, five hundred ninety-one thousand, six hundred sixteen".