125667613257 has 4 divisors (see below), whose sum is σ = 167556817680. Its totient is φ = 83778408836.

The previous prime is 125667613249. The next prime is 125667613277. The reversal of 125667613257 is 752316766521.

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 125667613257 - 2³ = 125667613249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125667613277) 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 3 ways as a sum of consecutive naturals, for example, 20944602207 + ... + 20944602212.

It is an arithmetic number, because the mean of its divisors is an integer number (41889204420).

Almost surely, 2^125667613257 is an apocalyptic number.

It is an amenable number.

125667613257 is a deficient number, since it is larger than the sum of its proper divisors (41889204423).

125667613257 is an equidigital number, since it uses as much as digits as its factorization.

125667613257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41889204422.

The product of its digits is 3175200, while the sum is 51.

The spelling of 125667613257 in words is "one hundred twenty-five billion, six hundred sixty-seven million, six hundred thirteen thousand, two hundred fifty-seven".