13631890787 has 4 divisors (see below), whose sum is σ = 13640670120. Its totient is φ = 13623111456.

The previous prime is 13631890751. The next prime is 13631890807. The reversal of 13631890787 is 78709813631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78709813631 = 206953 ⋅380327.

It is a cyclic number.

It is not a de Polignac number, because 13631890787 - 2¹² = 13631886691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13631890187) 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, 4387337 + ... + 4390442.

It is an arithmetic number, because the mean of its divisors is an integer number (3410167530).

Almost surely, 2^13631890787 is an apocalyptic number.

13631890787 is a deficient number, since it is larger than the sum of its proper divisors (8779333).

13631890787 is an equidigital number, since it uses as much as digits as its factorization.

13631890787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8779332.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 13631890787 in words is "thirteen billion, six hundred thirty-one million, eight hundred ninety thousand, seven hundred eighty-seven".