12571012516 has 6 divisors (see below), whose sum is σ = 21999271910. Its totient is φ = 6285506256.

The previous prime is 12571012513. The next prime is 12571012567. The reversal of 12571012516 is 61521017521.

It can be written as a sum of positive squares in only one way, i.e., 11092302400 + 1478710116 = 105320^2 + 38454^2 .

It is not an unprimeable number, because it can be changed into a prime (12571012513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1571376561 + ... + 1571376568.

Almost surely, 2^12571012516 is an apocalyptic number.

It is an amenable number.

12571012516 is a deficient number, since it is larger than the sum of its proper divisors (9428259394).

12571012516 is a wasteful number, since it uses less digits than its factorization.

12571012516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142753133 (or 3142753131 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 12571012516 in words is "twelve billion, five hundred seventy-one million, twelve thousand, five hundred sixteen".