12777671500 has 48 divisors (see below), whose sum is σ = 30443396256. Its totient is φ = 4646424000.

The previous prime is 12777671479. The next prime is 12777671503. The reversal of 12777671500 is 517677721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12777671503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156107 + ... + 1167106.

It is an arithmetic number, because the mean of its divisors is an integer number (634237422).

Almost surely, 2^12777671500 is an apocalyptic number.

12777671500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12777671500 is an abundant number, since it is smaller than the sum of its proper divisors (17665724756).

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

12777671500 is a wasteful number, since it uses less digits than its factorization.

12777671500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323243 (or 2323231 counting only the distinct ones).

The product of its (nonzero) digits is 144060, while the sum is 43.

The spelling of 12777671500 in words is "twelve billion, seven hundred seventy-seven million, six hundred seventy-one thousand, five hundred".