13581621634 has 16 divisors (see below), whose sum is σ = 23290869888. Its totient is φ = 5818672512.

The previous prime is 13581621617. The next prime is 13581621673. The reversal of 13581621634 is 43612618531.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126447 + ... + 207730.

It is an arithmetic number, because the mean of its divisors is an integer number (1455679368).

Almost surely, 2^13581621634 is an apocalyptic number.

13581621634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13581621634 is a deficient number, since it is larger than the sum of its proper divisors (9709248254).

13581621634 is a wasteful number, since it uses less digits than its factorization.

13581621634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337089.

The product of its digits is 103680, while the sum is 40.

The spelling of 13581621634 in words is "thirteen billion, five hundred eighty-one million, six hundred twenty-one thousand, six hundred thirty-four".