728615943934669 has 32 divisors (see below), whose sum is σ = 857239602831360. Its totient is φ = 606346473762432.

The previous prime is 728615943934561. The next prime is 728615943934679. The reversal of 728615943934669 is 966439349516827.

It is not a de Polignac number, because 728615943934669 - 2⁹ = 728615943934157 is a prime.

It is a super-2 number, since 2×728615943934669² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 728615943934592 and 728615943934601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728615943934679) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49415257 + ... + 62442769.

It is an arithmetic number, because the mean of its divisors is an integer number (26788737588480).

Almost surely, 2^{728615943934669} is an apocalyptic number.

It is an amenable number.

728615943934669 is a deficient number, since it is larger than the sum of its proper divisors (128623658896691).

728615943934669 is a wasteful number, since it uses less digits than its factorization.

728615943934669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13028929.

The product of its digits is 12697896960, while the sum is 82.

The spelling of 728615943934669 in words is "seven hundred twenty-eight trillion, six hundred fifteen billion, nine hundred forty-three million, nine hundred thirty-four thousand, six hundred sixty-nine".