56540044004491 has 2 divisors, whose sum is σ = 56540044004492. Its totient is φ = 56540044004490.

The previous prime is 56540044004453. The next prime is 56540044004573. The reversal of 56540044004491 is 19440044004565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56540044004491 - 2²⁹ = 56539507133579 is a prime.

It is not a weakly prime, because it can be changed into another prime (56540044004441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28270022002245 + 28270022002246.

It is an arithmetic number, because the mean of its divisors is an integer number (28270022002246).

Almost surely, 2^{56540044004491} is an apocalyptic number.

56540044004491 is a deficient number, since it is larger than the sum of its proper divisors (1).

56540044004491 is an equidigital number, since it uses as much as digits as its factorization.

56540044004491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 56540044004491 in words is "fifty-six trillion, five hundred forty billion, forty-four million, four thousand, four hundred ninety-one".