8137581325 has 12 divisors (see below), whose sum is σ = 10101754240. Its totient is φ = 6502869360.

The previous prime is 8137581323. The next prime is 8137581343. The reversal of 8137581325 is 5231857318.

It is not a de Polignac number, because 8137581325 - 2¹ = 8137581323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8137581323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156765 + ... + 202114.

Almost surely, 2^8137581325 is an apocalyptic number.

It is an amenable number.

8137581325 is a deficient number, since it is larger than the sum of its proper divisors (1964172915).

8137581325 is a wasteful number, since it uses less digits than its factorization.

8137581325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359796 (or 359791 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 8137581325 is about 90208.5435255442. The cubic root of 8137581325 is about 2011.4000068761.

The spelling of 8137581325 in words is "eight billion, one hundred thirty-seven million, five hundred eighty-one thousand, three hundred twenty-five".