12571277565 has 64 divisors (see below), whose sum is σ = 25589145600. Its totient is φ = 5224403520.

The previous prime is 12571277549. The next prime is 12571277597. The reversal of 12571277565 is 56577217521.

It is not a de Polignac number, because 12571277565 - 2⁴ = 12571277549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54469 + ... + 167658.

It is an arithmetic number, because the mean of its divisors is an integer number (399830400).

Almost surely, 2^12571277565 is an apocalyptic number.

12571277565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12571277565 is an abundant number, since it is smaller than the sum of its proper divisors (13017868035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12571277565 is a wasteful number, since it uses less digits than its factorization.

12571277565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222167 (or 222153 counting only the distinct ones).

The product of its digits is 1029000, while the sum is 48.

The spelling of 12571277565 in words is "twelve billion, five hundred seventy-one million, two hundred seventy-seven thousand, five hundred sixty-five".