28059265081 has 9 divisors (see below), whose sum is σ = 29336303269. Its totient is φ = 26835611836.

The previous prime is 28059265043. The next prime is 28059265097. The reversal of 28059265081 is 18056295082.

The square root of 28059265081 is 167509.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28059265081 - 2⁷ = 28059264953 is a prime.

It is a super-2 number, since 2×28059265081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28059260081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3849066 + ... + 3856348.

Almost surely, 2^28059265081 is an apocalyptic number.

28059265081 is the 167509-th square number.

28059265081 is the 83755-th centered octagonal number.

It is an amenable number.

28059265081 is a deficient number, since it is larger than the sum of its proper divisors (1277038188).

28059265081 is an frugal number, since it uses more digits than its factorization.

28059265081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14612 (or 7306 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 28059265081 in words is "twenty-eight billion, fifty-nine million, two hundred sixty-five thousand, eighty-one".