28056123537 has 16 divisors (see below), whose sum is σ = 40318510848. Its totient is φ = 17251251840.

The previous prime is 28056123517. The next prime is 28056123569. The reversal of 28056123537 is 73532165082.

It is a happy number.

It is not a de Polignac number, because 28056123537 - 2¹⁴ = 28056107153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28056123517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244188 + ... + 340205.

It is an arithmetic number, because the mean of its divisors is an integer number (2519906928).

Almost surely, 2^28056123537 is an apocalyptic number.

It is an amenable number.

28056123537 is a deficient number, since it is larger than the sum of its proper divisors (12262387311).

28056123537 is a wasteful number, since it uses less digits than its factorization.

28056123537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585640.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 28056123537 in words is "twenty-eight billion, fifty-six million, one hundred twenty-three thousand, five hundred thirty-seven".