125879451871 has 4 divisors (see below), whose sum is σ = 132504686200. Its totient is φ = 119254217544.

The previous prime is 125879451851. The next prime is 125879451923. The reversal of 125879451871 is 178154978521.

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-125879451871 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 (125879451821) 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, 3312617136 + ... + 3312617173.

It is an arithmetic number, because the mean of its divisors is an integer number (33126171550).

Almost surely, 2^125879451871 is an apocalyptic number.

125879451871 is a deficient number, since it is larger than the sum of its proper divisors (6625234329).

125879451871 is an equidigital number, since it uses as much as digits as its factorization.

125879451871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6625234328.

The product of its digits is 5644800, while the sum is 58.

The spelling of 125879451871 in words is "one hundred twenty-five billion, eight hundred seventy-nine million, four hundred fifty-one thousand, eight hundred seventy-one".