13691277651 has 4 divisors (see below), whose sum is σ = 18255036872. Its totient is φ = 9127518432.

The previous prime is 13691277631. The next prime is 13691277661. The reversal of 13691277651 is 15677219631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15677219631 = 3 ⋅5225739877.

It is not a de Polignac number, because 13691277651 - 2⁵ = 13691277619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13691277651.

It is not an unprimeable number, because it can be changed into a prime (13691277601) 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, 2281879606 + ... + 2281879611.

It is an arithmetic number, because the mean of its divisors is an integer number (4563759218).

Almost surely, 2^13691277651 is an apocalyptic number.

13691277651 is a deficient number, since it is larger than the sum of its proper divisors (4563759221).

13691277651 is an equidigital number, since it uses as much as digits as its factorization.

13691277651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4563759220.

The product of its digits is 476280, while the sum is 48.

The spelling of 13691277651 in words is "thirteen billion, six hundred ninety-one million, two hundred seventy-seven thousand, six hundred fifty-one".