129768164 has 6 divisors (see below), whose sum is σ = 227094294. Its totient is φ = 64884080.

The previous prime is 129768103. The next prime is 129768169. The reversal of 129768164 is 461867921.

It can be written as a sum of positive squares in only one way, i.e., 126382564 + 3385600 = 11242^2 + 1840^2 .

It is not an unprimeable number, because it can be changed into a prime (129768169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16221017 + ... + 16221024.

It is an arithmetic number, because the mean of its divisors is an integer number (37849049).

Almost surely, 2^129768164 is an apocalyptic number.

It is an amenable number.

129768164 is a deficient number, since it is larger than the sum of its proper divisors (97326130).

129768164 is a wasteful number, since it uses less digits than its factorization.

129768164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32442045 (or 32442043 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 129768164 is about 11391.5830330995. The cubic root of 129768164 is about 506.2783857680.

The spelling of 129768164 in words is "one hundred twenty-nine million, seven hundred sixty-eight thousand, one hundred sixty-four".