7877640612440 has 32 divisors (see below), whose sum is σ = 17938241884080. Its totient is φ = 3113091710592.

The previous prime is 7877640612377. The next prime is 7877640612497. The reversal of 7877640612440 is 442160467787.

It is a congruent number.

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, 1186388339 + ... + 1186394978.

Almost surely, 2^{7877640612440} is an apocalyptic number.

It is an amenable number.

7877640612440 is an abundant number, since it is smaller than the sum of its proper divisors (10060601271640).

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

7877640612440 is a wasteful number, since it uses less digits than its factorization.

7877640612440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372783411 (or 2372783407 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 56.

The spelling of 7877640612440 in words is "seven trillion, eight hundred seventy-seven billion, six hundred forty million, six hundred twelve thousand, four hundred forty".