13751818641 has 12 divisors (see below), whose sum is σ = 21669532560. Its totient is φ = 8334435480.

The previous prime is 13751818637. The next prime is 13751818649. The reversal of 13751818641 is 14681815731.

13751818641 is a `hidden beast` number, since 13 + 7 + 518 + 1 + 86 + 41 = 666.

It is not a de Polignac number, because 13751818641 - 2² = 13751818637 is a prime.

It is a super-2 number, since 2×13751818641² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13751818649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69453531 + ... + 69453728.

It is an arithmetic number, because the mean of its divisors is an integer number (1805794380).

Almost surely, 2^13751818641 is an apocalyptic number.

13751818641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13751818641 is a deficient number, since it is larger than the sum of its proper divisors (7917713919).

13751818641 is a wasteful number, since it uses less digits than its factorization.

13751818641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138907276 (or 138907273 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The spelling of 13751818641 in words is "thirteen billion, seven hundred fifty-one million, eight hundred eighteen thousand, six hundred forty-one".