771583972140 has 36 divisors (see below), whose sum is σ = 2340471382704. Its totient is φ = 205755725856.

The previous prime is 771583972099. The next prime is 771583972141. The reversal of 771583972140 is 41279385177.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (771583972141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2143288632 + ... + 2143288991.

It is an arithmetic number, because the mean of its divisors is an integer number (65013093964).

Almost surely, 2^771583972140 is an apocalyptic number.

It is an amenable number.

771583972140 is an abundant number, since it is smaller than the sum of its proper divisors (1568887410564).

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

771583972140 is a wasteful number, since it uses less digits than its factorization.

771583972140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4286577638 (or 4286577633 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 54.

The spelling of 771583972140 in words is "seven hundred seventy-one billion, five hundred eighty-three million, nine hundred seventy-two thousand, one hundred forty".