56145253909 has 2 divisors, whose sum is σ = 56145253910. Its totient is φ = 56145253908.

The previous prime is 56145253867. The next prime is 56145253979. The reversal of 56145253909 is 90935254165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51064700625 + 5080553284 = 225975^2 + 71278^2 .

It is a cyclic number.

It is not a de Polignac number, because 56145253909 - 2¹⁹ = 56144729621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56145253979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28072626954 + 28072626955.

It is an arithmetic number, because the mean of its divisors is an integer number (28072626955).

Almost surely, 2^56145253909 is an apocalyptic number.

It is an amenable number.

56145253909 is a deficient number, since it is larger than the sum of its proper divisors (1).

56145253909 is an equidigital number, since it uses as much as digits as its factorization.

56145253909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 49.

The spelling of 56145253909 in words is "fifty-six billion, one hundred forty-five million, two hundred fifty-three thousand, nine hundred nine".