56490319649 has 2 divisors, whose sum is σ = 56490319650. Its totient is φ = 56490319648.

The previous prime is 56490319591. The next prime is 56490319651. The reversal of 56490319649 is 94691309465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39773122624 + 16717197025 = 199432^2 + 129295^2 .

It is a cyclic number.

It is not a de Polignac number, because 56490319649 - 2²⁰ = 56489271073 is a prime.

Together with 56490319651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 56490319594 and 56490319603.

It is not a weakly prime, because it can be changed into another prime (56490319549) 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, 28245159824 + 28245159825.

It is an arithmetic number, because the mean of its divisors is an integer number (28245159825).

Almost surely, 2^56490319649 is an apocalyptic number.

It is an amenable number.

56490319649 is a deficient number, since it is larger than the sum of its proper divisors (1).

56490319649 is an equidigital number, since it uses as much as digits as its factorization.

56490319649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 56.

The spelling of 56490319649 in words is "fifty-six billion, four hundred ninety million, three hundred nineteen thousand, six hundred forty-nine".