1656487552897 has 2 divisors, whose sum is σ = 1656487552898. Its totient is φ = 1656487552896.

The previous prime is 1656487552871. The next prime is 1656487552903. The reversal of 1656487552897 is 7982557846561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1403824498561 + 252663054336 = 1184831^2 + 502656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656487552897 - 2³⁵ = 1622127814529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656487552397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828243776448 + 828243776449.

It is an arithmetic number, because the mean of its divisors is an integer number (828243776449).

Almost surely, 2^{1656487552897} is an apocalyptic number.

It is an amenable number.

1656487552897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656487552897 is an equidigital number, since it uses as much as digits as its factorization.

1656487552897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064000, while the sum is 73.

The spelling of 1656487552897 in words is "one trillion, six hundred fifty-six billion, four hundred eighty-seven million, five hundred fifty-two thousand, eight hundred ninety-seven".