129102238864 has 45 divisors (see below), whose sum is σ = 256210623513. Its totient is φ = 63019748736.

The previous prime is 129102238861. The next prime is 129102238879. The reversal of 129102238864 is 468832201921.

The square root of 129102238864 is 359308.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 113765893264 + 15336345600 = 337292^2 + 123840^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129102238861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 61799932 + ... + 61802020.

Almost surely, 2^129102238864 is an apocalyptic number.

129102238864 is the 359308-th square number.

It is an amenable number.

129102238864 is a deficient number, since it is larger than the sum of its proper divisors (127108384649).

129102238864 is an frugal number, since it uses more digits than its factorization.

129102238864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4272 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 129102238864 in words is "one hundred twenty-nine billion, one hundred two million, two hundred thirty-eight thousand, eight hundred sixty-four".