77867689548 has 24 divisors (see below), whose sum is σ = 198208664640. Its totient is φ = 23596269520.

The previous prime is 77867689519. The next prime is 77867689573. The reversal of 77867689548 is 84598676877.

It is a self number, because there is not a number n which added to its sum of digits gives 77867689548.

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, 294953238 + ... + 294953501.

It is an arithmetic number, because the mean of its divisors is an integer number (8258694360).

Almost surely, 2^77867689548 is an apocalyptic number.

It is an amenable number.

77867689548 is an abundant number, since it is smaller than the sum of its proper divisors (120340975092).

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

77867689548 is a wasteful number, since it uses less digits than its factorization.

77867689548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589906757 (or 589906755 counting only the distinct ones).

The product of its digits is 1137991680, while the sum is 75.

The spelling of 77867689548 in words is "seventy-seven billion, eight hundred sixty-seven million, six hundred eighty-nine thousand, five hundred forty-eight".