725145681371 has 6 divisors (see below), whose sum is σ = 737442937980. Its totient is φ = 712848646548.

The previous prime is 725145681367. The next prime is 725145681391. The reversal of 725145681371 is 173186541527.

It is a happy number.

It is not a de Polignac number, because 725145681371 - 2² = 725145681367 is a prime.

It is a super-2 number, since 2×725145681371² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725145681331) 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 5 ways as a sum of consecutive naturals, for example, 6485486 + ... + 6596348.

It is an arithmetic number, because the mean of its divisors is an integer number (122907156330).

Almost surely, 2^725145681371 is an apocalyptic number.

725145681371 is a deficient number, since it is larger than the sum of its proper divisors (12297256609).

725145681371 is an frugal number, since it uses more digits than its factorization.

725145681371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221785 (or 110922 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 50.

The spelling of 725145681371 in words is "seven hundred twenty-five billion, one hundred forty-five million, six hundred eighty-one thousand, three hundred seventy-one".