12777838320 has 80 divisors (see below), whose sum is σ = 42658332192. Its totient is φ = 3145313280.

The previous prime is 12777838309. The next prime is 12777838343. The reversal of 12777838320 is 2383877721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12777838320.

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, 2044611 + ... + 2050850.

Almost surely, 2^12777838320 is an apocalyptic number.

12777838320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12777838320 is an abundant number, since it is smaller than the sum of its proper divisors (29880493872).

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

12777838320 is a wasteful number, since it uses less digits than its factorization.

12777838320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095490 (or 4095484 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The spelling of 12777838320 in words is "twelve billion, seven hundred seventy-seven million, eight hundred thirty-eight thousand, three hundred twenty".