725197554 has 12 divisors (see below), whose sum is σ = 1571261406. Its totient is φ = 241732512.

The previous prime is 725197547. The next prime is 725197579. The reversal of 725197554 is 455791527.

725197554 is a `hidden beast` number, since 7 + 2 + 5 + 1 + 97 + 554 = 666.

It can be written as a sum of positive squares in only one way, i.e., 681993225 + 43204329 = 26115^2 + 6573^2 .

It is a super-2 number, since 2×725197554² = 1051822984655165832, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20144359 + ... + 20144394.

Almost surely, 2^725197554 is an apocalyptic number.

725197554 is an abundant number, since it is smaller than the sum of its proper divisors (846063852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725197554 is a wasteful number, since it uses less digits than its factorization.

725197554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40288761 (or 40288758 counting only the distinct ones).

The product of its digits is 441000, while the sum is 45.

The square root of 725197554 is about 26929.4922714856. The cubic root of 725197554 is about 898.4324788563.

The spelling of 725197554 in words is "seven hundred twenty-five million, one hundred ninety-seven thousand, five hundred fifty-four".