725121630213526 has 64 divisors (see below), whose sum is σ = 1407550097278080. Its totient is φ = 272429050844160.

The previous prime is 725121630213523. The next prime is 725121630213569. The reversal of 725121630213526 is 625312036121527.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725121630213523) 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 31 ways as a sum of consecutive naturals, for example, 1125790191 + ... + 1126434106.

It is an arithmetic number, because the mean of its divisors is an integer number (21992970269970).

Almost surely, 2^{725121630213526} is an apocalyptic number.

725121630213526 is a deficient number, since it is larger than the sum of its proper divisors (682428467064554).

725121630213526 is a wasteful number, since it uses less digits than its factorization.

725121630213526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252224409.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 725121630213526 in words is "seven hundred twenty-five trillion, one hundred twenty-one billion, six hundred thirty million, two hundred thirteen thousand, five hundred twenty-six".