725153985 has 32 divisors (see below), whose sum is σ = 1304714880. Its totient is φ = 382083264.

The previous prime is 725153983. The next prime is 725153993. The reversal of 725153985 is 589351527.

725153985 is a `hidden beast` number, since 7 + 251 + 5 + 398 + 5 = 666.

725153985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 725153985 - 2¹ = 725153983 is a prime.

It is a super-2 number, since 2×725153985² = 1051696603922760450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 725153985.

It is not an unprimeable number, because it can be changed into a prime (725153983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21154 + ... + 43563.

It is an arithmetic number, because the mean of its divisors is an integer number (40772340).

Almost surely, 2^725153985 is an apocalyptic number.

It is an amenable number.

725153985 is a deficient number, since it is larger than the sum of its proper divisors (579560895).

725153985 is a wasteful number, since it uses less digits than its factorization.

725153985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64814 (or 64808 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 725153985 is about 26928.6833135228. The cubic root of 725153985 is about 898.4144862470.

The spelling of 725153985 in words is "seven hundred twenty-five million, one hundred fifty-three thousand, nine hundred eighty-five".