125775667579 has 4 divisors (see below), whose sum is σ = 129175009984. Its totient is φ = 122376325176.

The previous prime is 125775667573. The next prime is 125775667583. The reversal of 125775667579 is 975766577521.

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

It is not a de Polignac number, because 125775667579 - 2⁵ = 125775667547 is a prime.

It is a super-2 number, since 2×125775667579² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125775667573) 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, 1699671147 + ... + 1699671220.

It is an arithmetic number, because the mean of its divisors is an integer number (32293752496).

Almost surely, 2^125775667579 is an apocalyptic number.

125775667579 is a deficient number, since it is larger than the sum of its proper divisors (3399342405).

125775667579 is an equidigital number, since it uses as much as digits as its factorization.

125775667579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399342404.

The product of its digits is 194481000, while the sum is 67.

The spelling of 125775667579 in words is "one hundred twenty-five billion, seven hundred seventy-five million, six hundred sixty-seven thousand, five hundred seventy-nine".