125391387779 has 8 divisors (see below), whose sum is σ = 151734116448. Its totient is φ = 101156077440.

The previous prime is 125391387769. The next prime is 125391387791. The reversal of 125391387779 is 977783193521.

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 125391387779 - 2²⁸ = 125122952323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125391387769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526854452 + ... + 526854689.

It is an arithmetic number, because the mean of its divisors is an integer number (18966764556).

Almost surely, 2^125391387779 is an apocalyptic number.

125391387779 is a deficient number, since it is larger than the sum of its proper divisors (26342728669).

125391387779 is a wasteful number, since it uses less digits than its factorization.

125391387779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053709165.

The product of its digits is 20003760, while the sum is 62.

The spelling of 125391387779 in words is "one hundred twenty-five billion, three hundred ninety-one million, three hundred eighty-seven thousand, seven hundred seventy-nine".