12512637501391 has 4 divisors (see below), whose sum is σ = 12576153427992. Its totient is φ = 12449121574792.

The previous prime is 12512637501389. The next prime is 12512637501449. The reversal of 12512637501391 is 19310573621521.

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

It is a cyclic number.

It is not a de Polignac number, because 12512637501391 - 2¹ = 12512637501389 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 (12512637501341) 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, 31757963005 + ... + 31757963398.

It is an arithmetic number, because the mean of its divisors is an integer number (3144038356998).

Almost surely, 2^{12512637501391} is an apocalyptic number.

12512637501391 is a deficient number, since it is larger than the sum of its proper divisors (63515926601).

12512637501391 is an equidigital number, since it uses as much as digits as its factorization.

12512637501391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63515926600.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 12512637501391 in words is "twelve trillion, five hundred twelve billion, six hundred thirty-seven million, five hundred one thousand, three hundred ninety-one".