129865260387 has 16 divisors (see below), whose sum is σ = 181878686208. Its totient is φ = 82264195200.

The previous prime is 129865260377. The next prime is 129865260389. The reversal of 129865260387 is 783062568921.

It is not a de Polignac number, because 129865260387 - 2⁶ = 129865260323 is a prime.

It is a super-2 number, since 2×129865260387² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129865260389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6221718 + ... + 6242555.

It is an arithmetic number, because the mean of its divisors is an integer number (11367417888).

Almost surely, 2^129865260387 is an apocalyptic number.

129865260387 is a deficient number, since it is larger than the sum of its proper divisors (52013425821).

129865260387 is a wasteful number, since it uses less digits than its factorization.

129865260387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12464450.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 129865260387 in words is "one hundred twenty-nine billion, eight hundred sixty-five million, two hundred sixty thousand, three hundred eighty-seven".