56897321519 has 2 divisors, whose sum is σ = 56897321520. Its totient is φ = 56897321518.

The previous prime is 56897321497. The next prime is 56897321543. The reversal of 56897321519 is 91512379865.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56897321519 - 2¹⁶ = 56897255983 is a prime.

It is a super-2 number, since 2×56897321519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56897323519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28448660759 + 28448660760.

It is an arithmetic number, because the mean of its divisors is an integer number (28448660760).

Almost surely, 2^56897321519 is an apocalyptic number.

56897321519 is a deficient number, since it is larger than the sum of its proper divisors (1).

56897321519 is an equidigital number, since it uses as much as digits as its factorization.

56897321519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 56.

The spelling of 56897321519 in words is "fifty-six billion, eight hundred ninety-seven million, three hundred twenty-one thousand, five hundred nineteen".