125861690601 has 6 divisors (see below), whose sum is σ = 181800219770. Its totient is φ = 83907793728.

The previous prime is 125861690597. The next prime is 125861690627. The reversal of 125861690601 is 106096168521.

125861690601 is a `hidden beast` number, since 1 + 2 + 586 + 1 + 6 + 9 + 0 + 60 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 115260929001 + 10600761600 = 339501^2 + 102960^2 .

It is not a de Polignac number, because 125861690601 - 2² = 125861690597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125861690641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6992316136 + ... + 6992316153.

Almost surely, 2^125861690601 is an apocalyptic number.

It is an amenable number.

125861690601 is a deficient number, since it is larger than the sum of its proper divisors (55938529169).

125861690601 is a wasteful number, since it uses less digits than its factorization.

125861690601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13984632295 (or 13984632292 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 125861690601 in words is "one hundred twenty-five billion, eight hundred sixty-one million, six hundred ninety thousand, six hundred one".