28521037662811 has 2 divisors, whose sum is σ = 28521037662812. Its totient is φ = 28521037662810.

The previous prime is 28521037662709. The next prime is 28521037662839. The reversal of 28521037662811 is 11826673012582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28521037662811 - 2²⁵ = 28521004108379 is a prime.

It is not a weakly prime, because it can be changed into another prime (28521037662851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14260518831405 + 14260518831406.

It is an arithmetic number, because the mean of its divisors is an integer number (14260518831406).

Almost surely, 2^{28521037662811} is an apocalyptic number.

28521037662811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28521037662811 is an equidigital number, since it uses as much as digits as its factorization.

28521037662811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 28521037662811 in words is "twenty-eight trillion, five hundred twenty-one billion, thirty-seven million, six hundred sixty-two thousand, eight hundred eleven".