725018456065 has 4 divisors (see below), whose sum is σ = 870022147284. Its totient is φ = 580014764848.

The previous prime is 725018456053. The next prime is 725018456161. The reversal of 725018456065 is 560654810527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560654810527 = 7 ⋅80093544361.

It can be written as a sum of positive squares in 2 ways, for example, as 145428585201 + 579589870864 = 381351^2 + 761308^2 .

It is a cyclic number.

It is not a de Polignac number, because 725018456065 - 2¹³ = 725018447873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72501845602 + ... + 72501845611.

It is an arithmetic number, because the mean of its divisors is an integer number (217505536821).

Almost surely, 2^725018456065 is an apocalyptic number.

It is an amenable number.

725018456065 is a deficient number, since it is larger than the sum of its proper divisors (145003691219).

725018456065 is a wasteful number, since it uses less digits than its factorization.

725018456065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145003691218.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 725018456065 in words is "seven hundred twenty-five billion, eighteen million, four hundred fifty-six thousand, sixty-five".