1291677925513 has 4 divisors (see below), whose sum is σ = 1299602330128. Its totient is φ = 1283753520900.

The previous prime is 1291677925493. The next prime is 1291677925541. The reversal of 1291677925513 is 3155297761921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1291677925513 - 2²¹ = 1291675828361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291677925313) 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, 3962202063 + ... + 3962202388.

It is an arithmetic number, because the mean of its divisors is an integer number (324900582532).

Almost surely, 2^{1291677925513} is an apocalyptic number.

It is an amenable number.

1291677925513 is a deficient number, since it is larger than the sum of its proper divisors (7924404615).

1291677925513 is an equidigital number, since it uses as much as digits as its factorization.

1291677925513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7924404614.

The product of its digits is 7144200, while the sum is 58.

The spelling of 1291677925513 in words is "one trillion, two hundred ninety-one billion, six hundred seventy-seven million, nine hundred twenty-five thousand, five hundred thirteen".