125406331871 has 4 divisors (see below), whose sum is σ = 125430835200. Its totient is φ = 125381828544.

The previous prime is 125406331829. The next prime is 125406331961. The reversal of 125406331871 is 178133604521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125406331871 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 (125406336871) 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, 12243986 + ... + 12254223.

It is an arithmetic number, because the mean of its divisors is an integer number (31357708800).

Almost surely, 2^125406331871 is an apocalyptic number.

125406331871 is a deficient number, since it is larger than the sum of its proper divisors (24503329).

125406331871 is an equidigital number, since it uses as much as digits as its factorization.

125406331871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24503328.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 125406331871 in words is "one hundred twenty-five billion, four hundred six million, three hundred thirty-one thousand, eight hundred seventy-one".