1856660053 has 2 divisors, whose sum is σ = 1856660054. Its totient is φ = 1856660052.

The previous prime is 1856660051. The next prime is 1856660077. The reversal of 1856660053 is 3500666581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050213649 + 806446404 = 32407^2 + 28398^2 .

It is an emirp because it is prime and its reverse (3500666581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1856660053 - 2¹ = 1856660051 is a prime.

Together with 1856660051, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1856659988 and 1856660015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1856660051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928330026 + 928330027.

It is an arithmetic number, because the mean of its divisors is an integer number (928330027).

Almost surely, 2^1856660053 is an apocalyptic number.

It is an amenable number.

1856660053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1856660053 is an equidigital number, since it uses as much as digits as its factorization.

1856660053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1856660053 is about 43088.9783239287. The cubic root of 1856660053 is about 1229.0723949001.

The spelling of 1856660053 in words is "one billion, eight hundred fifty-six million, six hundred sixty thousand, fifty-three".