125133402565 has 4 divisors (see below), whose sum is σ = 150160083084. Its totient is φ = 100106722048.

The previous prime is 125133402553. The next prime is 125133402601. The reversal of 125133402565 is 565204331521.

It is a Cunningham number, because it is equal to 353742²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45048364516 + 80085038049 = 212246^2 + 282993^2 .

It is a cyclic number.

It is not a de Polignac number, because 125133402565 - 2⁵ = 125133402533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12513340252 + ... + 12513340261.

It is an arithmetic number, because the mean of its divisors is an integer number (37540020771).

Almost surely, 2^125133402565 is an apocalyptic number.

It is an amenable number.

125133402565 is a deficient number, since it is larger than the sum of its proper divisors (25026680519).

125133402565 is an equidigital number, since it uses as much as digits as its factorization.

125133402565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25026680518.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 125133402565 in words is "one hundred twenty-five billion, one hundred thirty-three million, four hundred two thousand, five hundred sixty-five".