56897321543 has 2 divisors, whose sum is σ = 56897321544. Its totient is φ = 56897321542.

The previous prime is 56897321519. The next prime is 56897321581. The reversal of 56897321543 is 34512379865.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56897321543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56837321543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28448660771 + 28448660772.

It is an arithmetic number, because the mean of its divisors is an integer number (28448660772).

Almost surely, 2^56897321543 is an apocalyptic number.

56897321543 is a deficient number, since it is larger than the sum of its proper divisors (1).

56897321543 is an equidigital number, since it uses as much as digits as its factorization.

56897321543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The spelling of 56897321543 in words is "fifty-six billion, eight hundred ninety-seven million, three hundred twenty-one thousand, five hundred forty-three".