125620172766 has 72 divisors (see below), whose sum is σ = 312177312720. Its totient is φ = 36411629760.

The previous prime is 125620172753. The next prime is 125620172801. The reversal of 125620172766 is 667271026521.

125620172766 is a `hidden beast` number, since 1 + 2 + 5 + 620 + 17 + 2 + 7 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1203751 + ... + 1303938.

It is an arithmetic number, because the mean of its divisors is an integer number (4335796010).

Almost surely, 2^125620172766 is an apocalyptic number.

125620172766 is an abundant number, since it is smaller than the sum of its proper divisors (186557139954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125620172766 is a wasteful number, since it uses less digits than its factorization.

125620172766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507742 (or 2507728 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 125620172766 in words is "one hundred twenty-five billion, six hundred twenty million, one hundred seventy-two thousand, seven hundred sixty-six".