125685553801 has 2 divisors, whose sum is σ = 125685553802. Its totient is φ = 125685553800.

The previous prime is 125685553781. The next prime is 125685553837. The reversal of 125685553801 is 108355586521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125653234576 + 32319225 = 354476^2 + 5685^2 .

It is a cyclic number.

It is not a de Polignac number, because 125685553801 - 2⁵ = 125685553769 is a prime.

It is not a weakly prime, because it can be changed into another prime (125685553001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62842776900 + 62842776901.

It is an arithmetic number, because the mean of its divisors is an integer number (62842776901).

Almost surely, 2^125685553801 is an apocalyptic number.

It is an amenable number.

125685553801 is a deficient number, since it is larger than the sum of its proper divisors (1).

125685553801 is an equidigital number, since it uses as much as digits as its factorization.

125685553801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440000, while the sum is 49.

The spelling of 125685553801 in words is "one hundred twenty-five billion, six hundred eighty-five million, five hundred fifty-three thousand, eight hundred one".