725456655 has 160 divisors (see below), whose sum is σ = 1662110208. Its totient is φ = 293932800.

The previous prime is 725456653. The next prime is 725456671. The reversal of 725456655 is 556654527.

It is not a de Polignac number, because 725456655 - 2¹ = 725456653 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 725456655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725456653) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1340685 + ... + 1341225.

Almost surely, 2^725456655 is an apocalyptic number.

725456655 is an abundant number, since it is smaller than the sum of its proper divisors (936653553).

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

725456655 is a wasteful number, since it uses less digits than its factorization.

725456655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619 (or 610 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 45.

The square root of 725456655 is about 26934.3025712566. The cubic root of 725456655 is about 898.5394644331.

The spelling of 725456655 in words is "seven hundred twenty-five million, four hundred fifty-six thousand, six hundred fifty-five".