12577979551 has 4 divisors (see below), whose sum is σ = 12702514104. Its totient is φ = 12453445000.

The previous prime is 12577979509. The next prime is 12577979563. The reversal of 12577979551 is 15597977521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12577979551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12577979501) 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, 62267125 + ... + 62267326.

It is an arithmetic number, because the mean of its divisors is an integer number (3175628526).

Almost surely, 2^12577979551 is an apocalyptic number.

12577979551 is a deficient number, since it is larger than the sum of its proper divisors (124534553).

12577979551 is a wasteful number, since it uses less digits than its factorization.

12577979551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124534552.

The product of its digits is 6945750, while the sum is 58.

The spelling of 12577979551 in words is "twelve billion, five hundred seventy-seven million, nine hundred seventy-nine thousand, five hundred fifty-one".