28696152620641 has 63 divisors (see below), whose sum is σ = 33769928006689. Its totient is φ = 24366299819400.

The previous prime is 28696152620633. The next prime is 28696152620683. The reversal of 28696152620641 is 14602625169682.

The square root of 28696152620641 is 5356879.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28696152620641 - 2³ = 28696152620633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28696152620621) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 404171163636 + ... + 404171163706.

Almost surely, 2^{28696152620641} is an apocalyptic number.

28696152620641 is the 5356879-th square number.

28696152620641 is the 2678440-th centered octagonal number.

It is an amenable number.

28696152620641 is a deficient number, since it is larger than the sum of its proper divisors (5073775386048).

28696152620641 is an frugal number, since it uses more digits than its factorization.

28696152620641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 28696152620641 in words is "twenty-eight trillion, six hundred ninety-six billion, one hundred fifty-two million, six hundred twenty thousand, six hundred forty-one".