28637773497 has 12 divisors (see below), whose sum is σ = 42146157924. Its totient is φ = 18731625120.

The previous prime is 28637773471. The next prime is 28637773513. The reversal of 28637773497 is 79437773682.

28637773497 is a `hidden beast` number, since 2 + 8 + 6 + 3 + 77 + 73 + 497 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22964068521 + 5673704976 = 151539^2 + 75324^2 .

It is not a de Polignac number, because 28637773497 - 2¹⁰ = 28637772473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28637773457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30018154 + ... + 30019107.

It is an arithmetic number, because the mean of its divisors is an integer number (3512179827).

Almost surely, 2^28637773497 is an apocalyptic number.

It is an amenable number.

28637773497 is a deficient number, since it is larger than the sum of its proper divisors (13508384427).

28637773497 is a wasteful number, since it uses less digits than its factorization.

28637773497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60037320 (or 60037317 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 63.

The spelling of 28637773497 in words is "twenty-eight billion, six hundred thirty-seven million, seven hundred seventy-three thousand, four hundred ninety-seven".