725361171664 has 10 divisors (see below), whose sum is σ = 1405387270130. Its totient is φ = 362680585824.

The previous prime is 725361171659. The next prime is 725361171677. The reversal of 725361171664 is 466171163527.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 647207378064 + 78153793600 = 804492^2 + 279560^2 .

It is a super-2 number, since 2×725361171664² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22667536599 + ... + 22667536630.

It is an arithmetic number, because the mean of its divisors is an integer number (140538727013).

Almost surely, 2^725361171664 is an apocalyptic number.

It is an amenable number.

725361171664 is a deficient number, since it is larger than the sum of its proper divisors (680026098466).

725361171664 is a wasteful number, since it uses less digits than its factorization.

725361171664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45335073237 (or 45335073231 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 725361171664 in words is "seven hundred twenty-five billion, three hundred sixty-one million, one hundred seventy-one thousand, six hundred sixty-four".