125921763801 has 6 divisors (see below), whose sum is σ = 181886992170. Its totient is φ = 83947842528.

The previous prime is 125921763787. The next prime is 125921763829. The reversal of 125921763801 is 108367129521.

125921763801 is a `hidden beast` number, since 1 + 2 + 5 + 9 + 2 + 1 + 7 + 638 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 121747957776 + 4173806025 = 348924^2 + 64605^2 .

It is not a de Polignac number, because 125921763801 - 2¹⁰ = 125921762777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125921763701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6995653536 + ... + 6995653553.

It is an arithmetic number, because the mean of its divisors is an integer number (30314498695).

Almost surely, 2^125921763801 is an apocalyptic number.

It is an amenable number.

125921763801 is a deficient number, since it is larger than the sum of its proper divisors (55965228369).

125921763801 is a wasteful number, since it uses less digits than its factorization.

125921763801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13991307095 (or 13991307092 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 125921763801 in words is "one hundred twenty-five billion, nine hundred twenty-one million, seven hundred sixty-three thousand, eight hundred one".