125918868617 has 8 divisors (see below), whose sum is σ = 126703416840. Its totient is φ = 125135297280.

The previous prime is 125918868613. The next prime is 125918868629. The reversal of 125918868617 is 716868819521.

It can be written as a sum of positive squares in 4 ways, for example, as 2383490041 + 123535378576 = 48821^2 + 351476^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 125918868617 - 2² = 125918868613 is a prime.

It is a super-3 number, since 3×125918868617³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125918868617.

It is not an unprimeable number, because it can be changed into a prime (125918868613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15233 + ... + 502065.

It is an arithmetic number, because the mean of its divisors is an integer number (15837927105).

Almost surely, 2^125918868617 is an apocalyptic number.

It is an amenable number.

125918868617 is a deficient number, since it is larger than the sum of its proper divisors (784548223).

125918868617 is a wasteful number, since it uses less digits than its factorization.

125918868617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488443.

The product of its digits is 11612160, while the sum is 62.

The spelling of 125918868617 in words is "one hundred twenty-five billion, nine hundred eighteen million, eight hundred sixty-eight thousand, six hundred seventeen".