815413299125 has 8 divisors (see below), whose sum is σ = 1017635797464. Its totient is φ = 652330639200.

The previous prime is 815413299007. The next prime is 815413299137. The reversal of 815413299125 is 521992314518.

It can be written as a sum of positive squares in 4 ways, for example, as 96909557809 + 718503741316 = 311303^2 + 847646^2 .

It is not a de Polignac number, because 815413299125 - 2¹⁶ = 815413233589 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 7 ways as a sum of consecutive naturals, for example, 3261653072 + ... + 3261653321.

It is an arithmetic number, because the mean of its divisors is an integer number (127204474683).

Almost surely, 2^815413299125 is an apocalyptic number.

It is an amenable number.

815413299125 is a deficient number, since it is larger than the sum of its proper divisors (202222498339).

815413299125 is an equidigital number, since it uses as much as digits as its factorization.

815413299125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523306408 (or 6523306398 counting only the distinct ones).

The product of its digits is 777600, while the sum is 50.

The spelling of 815413299125 in words is "eight hundred fifteen billion, four hundred thirteen million, two hundred ninety-nine thousand, one hundred twenty-five".