728837521225 has 24 divisors (see below), whose sum is σ = 985956716160. Its totient is φ = 530043048000.

The previous prime is 728837521219. The next prime is 728837521231. The reversal of 728837521225 is 522125738827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (728837521219) and next prime (728837521231).

It is not a de Polignac number, because 728837521225 - 2¹⁷ = 728837390153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13665360 + ... + 13718590.

It is an arithmetic number, because the mean of its divisors is an integer number (41081529840).

Almost surely, 2^728837521225 is an apocalyptic number.

It is an amenable number.

728837521225 is a deficient number, since it is larger than the sum of its proper divisors (257119194935).

728837521225 is a wasteful number, since it uses less digits than its factorization.

728837521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103041 (or 103036 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 52.

The spelling of 728837521225 in words is "seven hundred twenty-eight billion, eight hundred thirty-seven million, five hundred twenty-one thousand, two hundred twenty-five".