725645475 has 18 divisors (see below), whose sum is σ = 1299712076. Its totient is φ = 387010800.

The previous prime is 725645467. The next prime is 725645483. The reversal of 725645475 is 574546527.

It is an interprime number because it is at equal distance from previous prime (725645467) and next prime (725645483).

It is not a de Polignac number, because 725645475 - 2³ = 725645467 is a prime.

It is a super-2 number, since 2×725645475² = 1053122710775951250, which contains 22 as substring.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725645475.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1612321 + ... + 1612770.

Almost surely, 2^725645475 is an apocalyptic number.

725645475 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

725645475 is a deficient number, since it is larger than the sum of its proper divisors (574066601).

725645475 is a wasteful number, since it uses less digits than its factorization.

725645475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225107 (or 3225099 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

The square root of 725645475 is about 26937.8075388477. The cubic root of 725645475 is about 898.6174141874.

The spelling of 725645475 in words is "seven hundred twenty-five million, six hundred forty-five thousand, four hundred seventy-five".