28114797172561 has 24 divisors (see below), whose sum is σ = 30919401734144. Its totient is φ = 25545379860000.

The previous prime is 28114797172543. The next prime is 28114797172571. The reversal of 28114797172561 is 16527179741182.

It is not a de Polignac number, because 28114797172561 - 2²³ = 28114788783953 is a prime.

It is a super-2 number, since 2×28114797172561² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28114797172561.

It is not an unprimeable number, because it can be changed into a prime (28114797172531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3432396976 + ... + 3432405166.

Almost surely, 2^{28114797172561} is an apocalyptic number.

It is an amenable number.

28114797172561 is a deficient number, since it is larger than the sum of its proper divisors (2804604561583).

28114797172561 is a wasteful number, since it uses less digits than its factorization.

28114797172561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19765 (or 19754 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 61.

The spelling of 28114797172561 in words is "twenty-eight trillion, one hundred fourteen billion, seven hundred ninety-seven million, one hundred seventy-two thousand, five hundred sixty-one".