129057902388 has 18 divisors (see below), whose sum is σ = 326229697794. Its totient is φ = 43019300784.

The previous prime is 129057902359. The next prime is 129057902461. The reversal of 129057902388 is 883209750921.

129057902388 is a `hidden beast` number, since 129 + 0 + 57 + 90 + 2 + 388 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80416482084 + 48641420304 = 283578^2 + 220548^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×129057902388² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1792470831 + ... + 1792470902.

Almost surely, 2^129057902388 is an apocalyptic number.

129057902388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129057902388 is an abundant number, since it is smaller than the sum of its proper divisors (197171795406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129057902388 is a wasteful number, since it uses less digits than its factorization.

129057902388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584941743 (or 3584941738 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 129057902388 in words is "one hundred twenty-nine billion, fifty-seven million, nine hundred two thousand, three hundred eighty-eight".