125499156657 has 8 divisors (see below), whose sum is σ = 191236810176. Its totient is φ = 71713803792.

The previous prime is 125499156637. The next prime is 125499156659. The reversal of 125499156657 is 756651994521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125499156657 - 2⁸ = 125499156401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125499156657.

It is not an unprimeable number, because it can be changed into a prime (125499156659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2988075138 + ... + 2988075179.

It is an arithmetic number, because the mean of its divisors is an integer number (23904601272).

Almost surely, 2^125499156657 is an apocalyptic number.

It is an amenable number.

125499156657 is a deficient number, since it is larger than the sum of its proper divisors (65737653519).

125499156657 is an equidigital number, since it uses as much as digits as its factorization.

125499156657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5976150327.

The product of its digits is 20412000, while the sum is 60.

The spelling of 125499156657 in words is "one hundred twenty-five billion, four hundred ninety-nine million, one hundred fifty-six thousand, six hundred fifty-seven".