12639485577 has 8 divisors (see below), whose sum is σ = 17739628960. Its totient is φ = 7982832960.

The previous prime is 12639485549. The next prime is 12639485581. The reversal of 12639485577 is 77558493621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12639485577 - 2¹⁰ = 12639484553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 221745361 = 12639485577 / (1 + 2 + 6 + 3 + 9 + 4 + 8 + 5 + 5 + 7 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12639485777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110872624 + ... + 110872737.

It is an arithmetic number, because the mean of its divisors is an integer number (2217453620).

Almost surely, 2^12639485577 is an apocalyptic number.

It is an amenable number.

12639485577 is a deficient number, since it is larger than the sum of its proper divisors (5100143383).

12639485577 is a wasteful number, since it uses less digits than its factorization.

12639485577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221745383.

The product of its digits is 12700800, while the sum is 57.

The spelling of 12639485577 in words is "twelve billion, six hundred thirty-nine million, four hundred eighty-five thousand, five hundred seventy-seven".