125435109457 has 24 divisors (see below), whose sum is σ = 148026765600. Its totient is φ = 105965487936.

The previous prime is 125435109451. The next prime is 125435109461. The reversal of 125435109457 is 754901534521.

It is not a de Polignac number, because 125435109457 - 2¹¹ = 125435107409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125435109451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1667269 + ... + 1740877.

It is an arithmetic number, because the mean of its divisors is an integer number (6167781900).

Almost surely, 2^125435109457 is an apocalyptic number.

It is an amenable number.

125435109457 is a deficient number, since it is larger than the sum of its proper divisors (22591656143).

125435109457 is an equidigital number, since it uses as much as digits as its factorization.

125435109457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74125 (or 74118 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 46.

The spelling of 125435109457 in words is "one hundred twenty-five billion, four hundred thirty-five million, one hundred nine thousand, four hundred fifty-seven".