77678370484 has 36 divisors (see below), whose sum is σ = 160912263652. Its totient is φ = 32592320640.

The previous prime is 77678370463. The next prime is 77678370493. The reversal of 77678370484 is 48407387677.

It can be written as a sum of positive squares in 2 ways, for example, as 5628000400 + 72050370084 = 75020^2 + 268422^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6166497 + ... + 6179080.

Almost surely, 2^77678370484 is an apocalyptic number.

It is an amenable number.

77678370484 is an abundant number, since it is smaller than the sum of its proper divisors (83233893168).

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

77678370484 is a wasteful number, since it uses less digits than its factorization.

77678370484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345616 (or 12345603 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 61.

The spelling of 77678370484 in words is "seventy-seven billion, six hundred seventy-eight million, three hundred seventy thousand, four hundred eighty-four".