28112537048737 has 4 divisors (see below), whose sum is σ = 28112883458580. Its totient is φ = 28112190638896.

The previous prime is 28112537048731. The next prime is 28112537048749. The reversal of 28112537048737 is 73784073521182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13761198932881 + 14351338115856 = 3709609^2 + 3788316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28112537048737 is a prime.

It is a super-2 number, since 2×28112537048737² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28112537048731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173083162 + ... + 173245507.

It is an arithmetic number, because the mean of its divisors is an integer number (7028220864645).

Almost surely, 2^{28112537048737} is an apocalyptic number.

It is an amenable number.

28112537048737 is a deficient number, since it is larger than the sum of its proper divisors (346409843).

28112537048737 is an equidigital number, since it uses as much as digits as its factorization.

28112537048737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346409842.

The product of its (nonzero) digits is 15805440, while the sum is 58.

The spelling of 28112537048737 in words is "twenty-eight trillion, one hundred twelve billion, five hundred thirty-seven million, forty-eight thousand, seven hundred thirty-seven".