12621928877 has 4 divisors (see below), whose sum is σ = 12626107200. Its totient is φ = 12617750556.

The previous prime is 12621928873. The next prime is 12621928927. The reversal of 12621928877 is 77882912621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77882912621 = 1289 ⋅60421189.

It is a cyclic number.

It is not a de Polignac number, because 12621928877 - 2² = 12621928873 is a prime.

It is a super-2 number, since 2×12621928877² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621928873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2084627 + ... + 2090672.

It is an arithmetic number, because the mean of its divisors is an integer number (3156526800).

Almost surely, 2^12621928877 is an apocalyptic number.

It is an amenable number.

12621928877 is a deficient number, since it is larger than the sum of its proper divisors (4178323).

12621928877 is an equidigital number, since it uses as much as digits as its factorization.

12621928877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4178322.

The product of its digits is 1354752, while the sum is 53.

The spelling of 12621928877 in words is "twelve billion, six hundred twenty-one million, nine hundred twenty-eight thousand, eight hundred seventy-seven".