13885790661 has 64 divisors (see below), whose sum is σ = 21843118080. Its totient is φ = 8703936000.

The previous prime is 13885790641. The next prime is 13885790663. The reversal of 13885790661 is 16609758831.

13885790661 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 579 + 0 + 6 + 61 = 666.

It is not a de Polignac number, because 13885790661 - 2⁷ = 13885790533 is a prime.

It is a super-2 number, since 2×13885790661² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13885790598 and 13885790607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13885790663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10054191 + ... + 10055571.

It is an arithmetic number, because the mean of its divisors is an integer number (341298720).

Almost surely, 2^13885790661 is an apocalyptic number.

It is an amenable number.

13885790661 is a deficient number, since it is larger than the sum of its proper divisors (7957327419).

13885790661 is a wasteful number, since it uses less digits than its factorization.

13885790661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

It can be divided in two parts, 13885 and 790661, that added together give a triangular number (804546 = T₁₂₆₈).

The spelling of 13885790661 in words is "thirteen billion, eight hundred eighty-five million, seven hundred ninety thousand, six hundred sixty-one".