761985680 has 40 divisors (see below), whose sum is σ = 1795899192. Its totient is φ = 300616704.

The previous prime is 761985677. The next prime is 761985743. The reversal of 761985680 is 86589167.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9909904 + 752075776 = 3148^2 + 27424^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59399 + ... + 71078.

Almost surely, 2^761985680 is an apocalyptic number.

It is an amenable number.

761985680 is an abundant number, since it is smaller than the sum of its proper divisors (1033913512).

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

761985680 is a wasteful number, since it uses less digits than its factorization.

761985680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130563 (or 130557 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 761985680 is about 27604.0881030329. The cubic root of 761985680 is about 913.3746134870.

The spelling of 761985680 in words is "seven hundred sixty-one million, nine hundred eighty-five thousand, six hundred eighty".