764725366440 has 128 divisors (see below), whose sum is σ = 2913239520000. Its totient is φ = 174794367744.

The previous prime is 764725366403. The next prime is 764725366477. The reversal of 764725366440 is 44663527467.

764725366440 is a `hidden beast` number, since 7 + 6 + 4 + 7 + 2 + 536 + 64 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (764725366403) and next prime (764725366477).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50569515 + ... + 50584634.

It is an arithmetic number, because the mean of its divisors is an integer number (22759683750).

Almost surely, 2^764725366440 is an apocalyptic number.

764725366440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

764725366440 is an abundant number, since it is smaller than the sum of its proper divisors (2148514153560).

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

764725366440 is a wasteful number, since it uses less digits than its factorization.

764725366440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101154176 (or 101154166 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 54.

The spelling of 764725366440 in words is "seven hundred sixty-four billion, seven hundred twenty-five million, three hundred sixty-six thousand, four hundred forty".