125106615661 has 8 divisors (see below), whose sum is σ = 131699097920. Its totient is φ = 118514925792.

The previous prime is 125106615659. The next prime is 125106615691. The reversal of 125106615661 is 166516601521.

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 125106615661 - 2¹ = 125106615659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125106615691) 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, 140881 + ... + 519673.

It is an arithmetic number, because the mean of its divisors is an integer number (16462387240).

Almost surely, 2^125106615661 is an apocalyptic number.

It is an amenable number.

125106615661 is a deficient number, since it is larger than the sum of its proper divisors (6592482259).

125106615661 is a wasteful number, since it uses less digits than its factorization.

125106615661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396195.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 125106615661 in words is "one hundred twenty-five billion, one hundred six million, six hundred fifteen thousand, six hundred sixty-one".