125815529029 has 4 divisors (see below), whose sum is σ = 125829209376. Its totient is φ = 125801848684.

The previous prime is 125815529023. The next prime is 125815529057. The reversal of 125815529029 is 920925518521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125815529029 - 2⁵ = 125815528997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125815529023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6826369 + ... + 6844774.

It is an arithmetic number, because the mean of its divisors is an integer number (31457302344).

Almost surely, 2^125815529029 is an apocalyptic number.

It is an amenable number.

125815529029 is a deficient number, since it is larger than the sum of its proper divisors (13680347).

125815529029 is an equidigital number, since it uses as much as digits as its factorization.

125815529029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13680346.

The product of its (nonzero) digits is 648000, while the sum is 49.

The spelling of 125815529029 in words is "one hundred twenty-five billion, eight hundred fifteen million, five hundred twenty-nine thousand, twenty-nine".