129765076885 has 8 divisors (see below), whose sum is σ = 155725851960. Its totient is φ = 103806888384.

The previous prime is 129765076877. The next prime is 129765076907. The reversal of 129765076885 is 588670567921.

It can be written as a sum of positive squares in 4 ways, for example, as 15397335396 + 114367741489 = 124086^2 + 338183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129765076885 - 2³ = 129765076877 is a prime.

It is a super-2 number, since 2×129765076885² (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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534502 + ... + 738391.

It is an arithmetic number, because the mean of its divisors is an integer number (19465731495).

Almost surely, 2^129765076885 is an apocalyptic number.

It is an amenable number.

129765076885 is a deficient number, since it is larger than the sum of its proper divisors (25960775075).

129765076885 is a wasteful number, since it uses less digits than its factorization.

129765076885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293287.

The product of its (nonzero) digits is 50803200, while the sum is 64.

The spelling of 129765076885 in words is "one hundred twenty-nine billion, seven hundred sixty-five million, seventy-six thousand, eight hundred eighty-five".