12777455020 has 48 divisors (see below), whose sum is σ = 29365666848. Its totient is φ = 4631477760.

The previous prime is 12777454997. The next prime is 12777455081. The reversal of 12777455020 is 2055477721.

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, 23919 + ... + 161638.

It is an arithmetic number, because the mean of its divisors is an integer number (611784726).

Almost surely, 2^12777455020 is an apocalyptic number.

12777455020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12777455020 is an abundant number, since it is smaller than the sum of its proper divisors (16588211828).

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

12777455020 is a wasteful number, since it uses less digits than its factorization.

12777455020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185890 (or 185888 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 40.

The spelling of 12777455020 in words is "twelve billion, seven hundred seventy-seven million, four hundred fifty-five thousand, twenty".