129018792338 has 6 divisors (see below), whose sum is σ = 193528950471. Its totient is φ = 64509142182.

The previous prime is 129018792313. The next prime is 129018792347. The reversal of 129018792338 is 833297810921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64509396169 + 64509396169 = 253987^2 + 253987^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=253987.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129018792338.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 380981 + ... + 634967.

Almost surely, 2^129018792338 is an apocalyptic number.

129018792338 is a deficient number, since it is larger than the sum of its proper divisors (64510158133).

129018792338 is an frugal number, since it uses more digits than its factorization.

129018792338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507976 (or 253989 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 129018792338 in words is "one hundred twenty-nine billion, eighteen million, seven hundred ninety-two thousand, three hundred thirty-eight".