125499156401 has 2 divisors, whose sum is σ = 125499156402. Its totient is φ = 125499156400.

The previous prime is 125499156371. The next prime is 125499156427. The reversal of 125499156401 is 104651994521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79593951376 + 45905205025 = 282124^2 + 214255^2 .

It is a cyclic number.

It is not a de Polignac number, because 125499156401 - 2²⁶ = 125432047537 is a prime.

It is not a weakly prime, because it can be changed into another prime (125499156301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62749578200 + 62749578201.

It is an arithmetic number, because the mean of its divisors is an integer number (62749578201).

Almost surely, 2^125499156401 is an apocalyptic number.

It is an amenable number.

125499156401 is a deficient number, since it is larger than the sum of its proper divisors (1).

125499156401 is an equidigital number, since it uses as much as digits as its factorization.

125499156401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 125499156401 in words is "one hundred twenty-five billion, four hundred ninety-nine million, one hundred fifty-six thousand, four hundred one".