12777477684 has 48 divisors (see below), whose sum is σ = 31231605888. Its totient is φ = 4058103808.

The previous prime is 12777477659. The next prime is 12777477697. The reversal of 12777477684 is 48677477721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19137 + ... + 161000.

It is an arithmetic number, because the mean of its divisors is an integer number (650658456).

Almost surely, 2^12777477684 is an apocalyptic number.

It is an amenable number.

12777477684 is an abundant number, since it is smaller than the sum of its proper divisors (18454128204).

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

12777477684 is a wasteful number, since it uses less digits than its factorization.

12777477684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180424 (or 180422 counting only the distinct ones).

The product of its digits is 25815552, while the sum is 60.

The spelling of 12777477684 in words is "twelve billion, seven hundred seventy-seven million, four hundred seventy-seven thousand, six hundred eighty-four".