77766874501056 has 56 divisors (see below), whose sum is σ = 221585741774544. Its totient is φ = 23928269076480.

The previous prime is 77766874501031. The next prime is 77766874501061. The reversal of 77766874501056 is 65010547866777.

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, 15578297685 + ... + 15578302676.

It is an arithmetic number, because the mean of its divisors is an integer number (3956888245974).

Almost surely, 2^{77766874501056} is an apocalyptic number.

It is an amenable number.

77766874501056 is an abundant number, since it is smaller than the sum of its proper divisors (143818867273488).

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

77766874501056 is a wasteful number, since it uses less digits than its factorization.

77766874501056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31156600389 (or 31156600379 counting only the distinct ones).

The product of its (nonzero) digits is 414892800, while the sum is 69.

The spelling of 77766874501056 in words is "seventy-seven trillion, seven hundred sixty-six billion, eight hundred seventy-four million, five hundred one thousand, fifty-six".