725837553 has 24 divisors (see below), whose sum is σ = 1201511168. Its totient is φ = 413620992.

The previous prime is 725837531. The next prime is 725837587. The reversal of 725837553 is 355738527.

It is not a de Polignac number, because 725837553 - 2⁹ = 725837041 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725837499 and 725837508.

It is not an unprimeable number, because it can be changed into a prime (725837513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7425 + ... + 38817.

Almost surely, 2^725837553 is an apocalyptic number.

It is an amenable number.

725837553 is a deficient number, since it is larger than the sum of its proper divisors (475673615).

725837553 is a wasteful number, since it uses less digits than its factorization.

725837553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31773 (or 31770 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 725837553 is about 26941.3725151485. The cubic root of 725837553 is about 898.6966950550.

The spelling of 725837553 in words is "seven hundred twenty-five million, eight hundred thirty-seven thousand, five hundred fifty-three".