125655712961 has 2 divisors, whose sum is σ = 125655712962. Its totient is φ = 125655712960.

The previous prime is 125655712943. The next prime is 125655712979. The reversal of 125655712961 is 169217556521.

It is a balanced prime because it is at equal distance from previous prime (125655712943) and next prime (125655712979).

It can be written as a sum of positive squares in only one way, i.e., 120908502961 + 4747210000 = 347719^2 + 68900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125655712961 is a prime.

It is not a weakly prime, because it can be changed into another prime (125655712901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62827856480 + 62827856481.

It is an arithmetic number, because the mean of its divisors is an integer number (62827856481).

Almost surely, 2^125655712961 is an apocalyptic number.

It is an amenable number.

125655712961 is a deficient number, since it is larger than the sum of its proper divisors (1).

125655712961 is an equidigital number, since it uses as much as digits as its factorization.

125655712961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 50.

The spelling of 125655712961 in words is "one hundred twenty-five billion, six hundred fifty-five million, seven hundred twelve thousand, nine hundred sixty-one".