129761564 has 12 divisors (see below), whose sum is σ = 239034600. Its totient is φ = 61465968.

The previous prime is 129761551. The next prime is 129761603. The reversal of 129761564 is 465167921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853619 + ... + 853770.

It is an arithmetic number, because the mean of its divisors is an integer number (19919550).

Almost surely, 2^129761564 is an apocalyptic number.

It is an amenable number.

129761564 is a deficient number, since it is larger than the sum of its proper divisors (109273036).

129761564 is a wasteful number, since it uses less digits than its factorization.

129761564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707412 (or 1707410 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 129761564 is about 11391.2933418467. The cubic root of 129761564 is about 506.2698025277.

The spelling of 129761564 in words is "one hundred twenty-nine million, seven hundred sixty-one thousand, five hundred sixty-four".