28738872594461 has 2 divisors, whose sum is σ = 28738872594462. Its totient is φ = 28738872594460.

The previous prime is 28738872594431. The next prime is 28738872594517. The reversal of 28738872594461 is 16449527883782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15755779116025 + 12983093478436 = 3969355^2 + 3603206^2 .

It is a cyclic number.

It is not a de Polignac number, because 28738872594461 - 2²² = 28738868400157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28738872594431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14369436297230 + 14369436297231.

It is an arithmetic number, because the mean of its divisors is an integer number (14369436297231).

Almost surely, 2^{28738872594461} is an apocalyptic number.

It is an amenable number.

28738872594461 is a deficient number, since it is larger than the sum of its proper divisors (1).

28738872594461 is an equidigital number, since it uses as much as digits as its factorization.

28738872594461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1300561920, while the sum is 74.

The spelling of 28738872594461 in words is "twenty-eight trillion, seven hundred thirty-eight billion, eight hundred seventy-two million, five hundred ninety-four thousand, four hundred sixty-one".