12517020777 has 32 divisors (see below), whose sum is σ = 17273203200. Its totient is φ = 8058175488.

The previous prime is 12517020743. The next prime is 12517020793. The reversal of 12517020777 is 77702071521.

It is a de Polignac number, because none of the positive numbers 2^k-12517020777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12517020707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3948249 + ... + 3951417.

It is an arithmetic number, because the mean of its divisors is an integer number (539787600).

Almost surely, 2^12517020777 is an apocalyptic number.

It is an amenable number.

12517020777 is a deficient number, since it is larger than the sum of its proper divisors (4756182423).

12517020777 is a wasteful number, since it uses less digits than its factorization.

12517020777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3585.

The product of its (nonzero) digits is 48020, while the sum is 39.

The spelling of 12517020777 in words is "twelve billion, five hundred seventeen million, twenty thousand, seven hundred seventy-seven".