725741727021 has 16 divisors (see below), whose sum is σ = 1092798717120. Its totient is φ = 475896213360.

The previous prime is 725741726993. The next prime is 725741727023. The reversal of 725741727021 is 120727147527.

725741727021 is a `hidden beast` number, since 7 + 2 + 574 + 1 + 7 + 2 + 70 + 2 + 1 = 666.

It is not a de Polignac number, because 725741727021 - 2²⁶ = 725674618157 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (725741727023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220320675 + ... + 220323968.

It is an arithmetic number, because the mean of its divisors is an integer number (68299919820).

Almost surely, 2^725741727021 is an apocalyptic number.

It is an amenable number.

725741727021 is a deficient number, since it is larger than the sum of its proper divisors (367056990099).

725741727021 is a wasteful number, since it uses less digits than its factorization.

725741727021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440644713 (or 440644707 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The spelling of 725741727021 in words is "seven hundred twenty-five billion, seven hundred forty-one million, seven hundred twenty-seven thousand, twenty-one".