13887165990 has 32 divisors (see below), whose sum is σ = 33332536800. Its totient is φ = 3702873344.

The previous prime is 13887165979. The next prime is 13887166009. The reversal of 13887165990 is 9956178831.

It is a self number, because there is not a number n which added to its sum of digits gives 13887165990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420562 + ... + 452378.

It is an arithmetic number, because the mean of its divisors is an integer number (1041641775).

Almost surely, 2^13887165990 is an apocalyptic number.

13887165990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13887165990 is an abundant number, since it is smaller than the sum of its proper divisors (19445370810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13887165990 is a wasteful number, since it uses less digits than its factorization.

13887165990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46376.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 13887165990 in words is "thirteen billion, eight hundred eighty-seven million, one hundred sixty-five thousand, nine hundred ninety".