77257672516 has 24 divisors (see below), whose sum is σ = 138801705336. Its totient is φ = 37604167680.

The previous prime is 77257672501. The next prime is 77257672559. The reversal of 77257672516 is 61527675277.

It can be written as a sum of positive squares in 4 ways, for example, as 21698468416 + 55559204100 = 147304^2 + 235710^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440461 + ... + 590356.

It is an arithmetic number, because the mean of its divisors is an integer number (5783404389).

Almost surely, 2^77257672516 is an apocalyptic number.

It is an amenable number.

77257672516 is a deficient number, since it is larger than the sum of its proper divisors (61544032820).

77257672516 is a wasteful number, since it uses less digits than its factorization.

77257672516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031319 (or 1031317 counting only the distinct ones).

The product of its digits is 8643600, while the sum is 55.

The spelling of 77257672516 in words is "seventy-seven billion, two hundred fifty-seven million, six hundred seventy-two thousand, five hundred sixteen".