125311954477 has 2 divisors, whose sum is σ = 125311954478. Its totient is φ = 125311954476.

The previous prime is 125311954367. The next prime is 125311954483. The reversal of 125311954477 is 774459113521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82224989001 + 43086965476 = 286749^2 + 207574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125311954477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125311954477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125311954487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62655977238 + 62655977239.

It is an arithmetic number, because the mean of its divisors is an integer number (62655977239).

Almost surely, 2^125311954477 is an apocalyptic number.

It is an amenable number.

125311954477 is a deficient number, since it is larger than the sum of its proper divisors (1).

125311954477 is an equidigital number, since it uses as much as digits as its factorization.

125311954477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 49.

The spelling of 125311954477 in words is "one hundred twenty-five billion, three hundred eleven million, nine hundred fifty-four thousand, four hundred seventy-seven".