13687994415731 has 4 divisors (see below), whose sum is σ = 14159994223200. Its totient is φ = 13215994608264.

The previous prime is 13687994415659. The next prime is 13687994415763. The reversal of 13687994415731 is 13751449978631.

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 13687994415731 - 2¹⁴ = 13687994399347 is a prime.

It is a super-2 number, since 2×13687994415731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13687994915731) 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, 235999903691 + ... + 235999903748.

It is an arithmetic number, because the mean of its divisors is an integer number (3539998555800).

Almost surely, 2^{13687994415731} is an apocalyptic number.

13687994415731 is a deficient number, since it is larger than the sum of its proper divisors (471999807469).

13687994415731 is an equidigital number, since it uses as much as digits as its factorization.

13687994415731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471999807468.

The product of its digits is 137168640, while the sum is 68.

The spelling of 13687994415731 in words is "thirteen trillion, six hundred eighty-seven billion, nine hundred ninety-four million, four hundred fifteen thousand, seven hundred thirty-one".