28031110061 has 2 divisors, whose sum is σ = 28031110062. Its totient is φ = 28031110060.

The previous prime is 28031110049. The next prime is 28031110111. The reversal of 28031110061 is 16001113082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26333175625 + 1697934436 = 162275^2 + 41206^2 .

It is a cyclic number.

It is not a de Polignac number, because 28031110061 - 2²² = 28026915757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28031110021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015555030 + 14015555031.

It is an arithmetic number, because the mean of its divisors is an integer number (14015555031).

Almost surely, 2^28031110061 is an apocalyptic number.

It is an amenable number.

28031110061 is a deficient number, since it is larger than the sum of its proper divisors (1).

28031110061 is an equidigital number, since it uses as much as digits as its factorization.

28031110061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 28031110061 in words is "twenty-eight billion, thirty-one million, one hundred ten thousand, sixty-one".