125685553001 has 2 divisors, whose sum is σ = 125685553002. Its totient is φ = 125685553000.

The previous prime is 125685552997. The next prime is 125685553027. The reversal of 125685553001 is 100355586521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94691598400 + 30993954601 = 307720^2 + 176051^2 .

It is an emirp because it is prime and its reverse (100355586521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125685553001 - 2² = 125685552997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125685553001.

It is not a weakly prime, because it can be changed into another prime (125685553061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62842776500 + 62842776501.

It is an arithmetic number, because the mean of its divisors is an integer number (62842776501).

Almost surely, 2^125685553001 is an apocalyptic number.

It is an amenable number.

125685553001 is a deficient number, since it is larger than the sum of its proper divisors (1).

125685553001 is an equidigital number, since it uses as much as digits as its factorization.

125685553001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 125685553001 in words is "one hundred twenty-five billion, six hundred eighty-five million, five hundred fifty-three thousand, one".