125498116509 has 16 divisors (see below), whose sum is σ = 174438787584. Its totient is φ = 80164872000.

The previous prime is 125498116501. The next prime is 125498116543. The reversal of 125498116509 is 905611894521.

It is not a de Polignac number, because 125498116509 - 2³ = 125498116501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125498116501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6671014 + ... + 6689799.

It is an arithmetic number, because the mean of its divisors is an integer number (10902424224).

Almost surely, 2^125498116509 is an apocalyptic number.

It is an amenable number.

125498116509 is a deficient number, since it is larger than the sum of its proper divisors (48940671075).

125498116509 is a wasteful number, since it uses less digits than its factorization.

125498116509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360948.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 125498116509 in words is "one hundred twenty-five billion, four hundred ninety-eight million, one hundred sixteen thousand, five hundred nine".