28097572137 has 12 divisors (see below), whose sum is σ = 39796793136. Its totient is φ = 17629848640.

The previous prime is 28097572127. The next prime is 28097572159. The reversal of 28097572137 is 73127579082.

It is not a de Polignac number, because 28097572137 - 2¹⁰ = 28097571113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 28097572137.

It is not an unprimeable number, because it can be changed into a prime (28097572127) 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, 16203039 + ... + 16204772.

It is an arithmetic number, because the mean of its divisors is an integer number (3316399428).

Almost surely, 2^28097572137 is an apocalyptic number.

It is an amenable number.

28097572137 is a deficient number, since it is larger than the sum of its proper divisors (11699220999).

28097572137 is a wasteful number, since it uses less digits than its factorization.

28097572137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32407848 (or 32407831 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 28097572137 in words is "twenty-eight billion, ninety-seven million, five hundred seventy-two thousand, one hundred thirty-seven".