12547712477 has 16 divisors (see below), whose sum is σ = 12777327024. Its totient is φ = 12320640000.

The previous prime is 12547712467. The next prime is 12547712503. The reversal of 12547712477 is 77421774521.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 210279001 + 12337433476 = 14501^2 + 111074^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547712477 - 2¹⁴ = 12547696093 is a prime.

It is a super-2 number, since 2×12547712477² (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 (12547712407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6741527 + ... + 6743387.

It is an arithmetic number, because the mean of its divisors is an integer number (798582939).

Almost surely, 2^12547712477 is an apocalyptic number.

It is an amenable number.

12547712477 is a deficient number, since it is larger than the sum of its proper divisors (229614547).

12547712477 is a wasteful number, since it uses less digits than its factorization.

12547712477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480.

The product of its digits is 768320, while the sum is 47.

The spelling of 12547712477 in words is "twelve billion, five hundred forty-seven million, seven hundred twelve thousand, four hundred seventy-seven".