28043735866451 has 2 divisors, whose sum is σ = 28043735866452. Its totient is φ = 28043735866450.

The previous prime is 28043735866403. The next prime is 28043735866477. The reversal of 28043735866451 is 15466853734082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28043735866451 is a prime.

It is a super-2 number, since 2×28043735866451² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28043735806451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021867933225 + 14021867933226.

It is an arithmetic number, because the mean of its divisors is an integer number (14021867933226).

Almost surely, 2^{28043735866451} is an apocalyptic number.

28043735866451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28043735866451 is an equidigital number, since it uses as much as digits as its factorization.

28043735866451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116121600, while the sum is 62.

The spelling of 28043735866451 in words is "twenty-eight trillion, forty-three billion, seven hundred thirty-five million, eight hundred sixty-six thousand, four hundred fifty-one".