56783921391653 has 2 divisors, whose sum is σ = 56783921391654. Its totient is φ = 56783921391652.

The previous prime is 56783921391601. The next prime is 56783921391679. The reversal of 56783921391653 is 35619312938765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30508024887649 + 26275896504004 = 5523407^2 + 5126002^2 .

It is a cyclic number.

It is not a de Polignac number, because 56783921391653 - 2³⁸ = 56509043484709 is a prime.

It is a super-2 number, since 2×56783921391653² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56783921391053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28391960695826 + 28391960695827.

It is an arithmetic number, because the mean of its divisors is an integer number (28391960695827).

Almost surely, 2^{56783921391653} is an apocalyptic number.

It is an amenable number.

56783921391653 is a deficient number, since it is larger than the sum of its proper divisors (1).

56783921391653 is an equidigital number, since it uses as much as digits as its factorization.

56783921391653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 220449600, while the sum is 68.

The spelling of 56783921391653 in words is "fifty-six trillion, seven hundred eighty-three billion, nine hundred twenty-one million, three hundred ninety-one thousand, six hundred fifty-three".