125233051661 has 2 divisors, whose sum is σ = 125233051662. Its totient is φ = 125233051660.

The previous prime is 125233051633. The next prime is 125233051709. The reversal of 125233051661 is 166150332521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80191478761 + 45041572900 = 283181^2 + 212230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125233051661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125233051621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62616525830 + 62616525831.

It is an arithmetic number, because the mean of its divisors is an integer number (62616525831).

Almost surely, 2^125233051661 is an apocalyptic number.

It is an amenable number.

125233051661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125233051661 is an equidigital number, since it uses as much as digits as its factorization.

125233051661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 125233051661 in words is "one hundred twenty-five billion, two hundred thirty-three million, fifty-one thousand, six hundred sixty-one".