725811170861 has 16 divisors (see below), whose sum is σ = 858136151040. Its totient is φ = 600647322240.

The previous prime is 725811170849. The next prime is 725811170873. The reversal of 725811170861 is 168071118527.

It is an interprime number because it is at equal distance from previous prime (725811170849) and next prime (725811170873).

It is not a de Polignac number, because 725811170861 - 2¹⁴ = 725811154477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725811172861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6517316 + ... + 6627746.

It is an arithmetic number, because the mean of its divisors is an integer number (53633509440).

Almost surely, 2^725811170861 is an apocalyptic number.

It is an amenable number.

725811170861 is a deficient number, since it is larger than the sum of its proper divisors (132324980179).

725811170861 is a wasteful number, since it uses less digits than its factorization.

725811170861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142844.

The product of its (nonzero) digits is 188160, while the sum is 47.

The spelling of 725811170861 in words is "seven hundred twenty-five billion, eight hundred eleven million, one hundred seventy thousand, eight hundred sixty-one".