728625262815 has 80 divisors (see below), whose sum is σ = 1321590362400. Its totient is φ = 384026469120.

The previous prime is 728625262811. The next prime is 728625262829. The reversal of 728625262815 is 518262526827.

728625262815 is a `hidden beast` number, since 7 + 2 + 8 + 6 + 2 + 5 + 2 + 628 + 1 + 5 = 666.

It is not a de Polignac number, because 728625262815 - 2² = 728625262811 is a prime.

It is a super-2 number, since 2×728625262815² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728625262811) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11857320 + ... + 11918610.

It is an arithmetic number, because the mean of its divisors is an integer number (16519879530).

Almost surely, 2^728625262815 is an apocalyptic number.

728625262815 is a deficient number, since it is larger than the sum of its proper divisors (592965099585).

728625262815 is a wasteful number, since it uses less digits than its factorization.

728625262815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61654 (or 61645 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The spelling of 728625262815 in words is "seven hundred twenty-eight billion, six hundred twenty-five million, two hundred sixty-two thousand, eight hundred fifteen".