28076737081 has 2 divisors, whose sum is σ = 28076737082. Its totient is φ = 28076737080.

The previous prime is 28076737043. The next prime is 28076737181. The reversal of 28076737081 is 18073767082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21663129856 + 6413607225 = 147184^2 + 80085^2 .

It is a cyclic number.

It is not a de Polignac number, because 28076737081 - 2²⁵ = 28043182649 is a prime.

It is a super-2 number, since 2×28076737081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28076737021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14038368540 + 14038368541.

It is an arithmetic number, because the mean of its divisors is an integer number (14038368541).

Almost surely, 2^28076737081 is an apocalyptic number.

It is an amenable number.

28076737081 is a deficient number, since it is larger than the sum of its proper divisors (1).

28076737081 is an equidigital number, since it uses as much as digits as its factorization.

28076737081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 28076737081 in words is "twenty-eight billion, seventy-six million, seven hundred thirty-seven thousand, eighty-one".