771540768 has 48 divisors (see below), whose sum is σ = 2250329760. Its totient is φ = 257179968.

The previous prime is 771540751. The next prime is 771540793. The reversal of 771540768 is 867045177.

It is a tau number, because it is divible by the number of its divisors (48).

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, 445630 + ... + 447357.

It is an arithmetic number, because the mean of its divisors is an integer number (46881870).

Almost surely, 2^771540768 is an apocalyptic number.

It is an amenable number.

771540768 is an abundant number, since it is smaller than the sum of its proper divisors (1478788992).

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

771540768 is a wasteful number, since it uses less digits than its factorization.

771540768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893006 (or 892992 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 771540768 is about 27776.6226888727. The cubic root of 771540768 is about 917.1765866087.

The spelling of 771540768 in words is "seven hundred seventy-one million, five hundred forty thousand, seven hundred sixty-eight".