725631425226 has 24 divisors (see below), whose sum is σ = 1572218427780. Its totient is φ = 241874525376.

The previous prime is 725631425221. The next prime is 725631425227. The reversal of 725631425226 is 622524136527.

725631425226 is a `hidden beast` number, since 7 + 2 + 5 + 631 + 4 + 2 + 5 + 2 + 2 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 725479766001 + 151659225 = 851751^2 + 12315^2 .

It is not an unprimeable number, because it can be changed into a prime (725631425221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2243080 + ... + 2546108.

Almost surely, 2^725631425226 is an apocalyptic number.

725631425226 is an abundant number, since it is smaller than the sum of its proper divisors (846587002554).

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

725631425226 is a wasteful number, since it uses less digits than its factorization.

725631425226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436070 (or 436067 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 725631425226 in words is "seven hundred twenty-five billion, six hundred thirty-one million, four hundred twenty-five thousand, two hundred twenty-six".