725442818 has 4 divisors (see below), whose sum is σ = 1088164230. Its totient is φ = 362721408.

The previous prime is 725442769. The next prime is 725442821. The reversal of 725442818 is 818244527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 379743169 + 345699649 = 19487^2 + 18593^2 .

It is a super-2 number, since 2×725442818² = 1052534564375562248, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 181360703 + ... + 181360706.

Almost surely, 2^725442818 is an apocalyptic number.

725442818 is a deficient number, since it is larger than the sum of its proper divisors (362721412).

725442818 is a wasteful number, since it uses less digits than its factorization.

725442818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362721411.

The product of its digits is 143360, while the sum is 41.

The square root of 725442818 is about 26934.0457042755. The cubic root of 725442818 is about 898.5337516316.

The spelling of 725442818 in words is "seven hundred twenty-five million, four hundred forty-two thousand, eight hundred eighteen".