1856016790361 has 4 divisors (see below), whose sum is σ = 1856105349072. Its totient is φ = 1855928231652.

The previous prime is 1856016790357. The next prime is 1856016790363. The reversal of 1856016790361 is 1630976106581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1856016790361 - 2² = 1856016790357 is a prime.

It is a super-2 number, since 2×1856016790361² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1856016790363) 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 in 3 ways as a sum of consecutive naturals, for example, 44247911 + ... + 44289836.

It is an arithmetic number, because the mean of its divisors is an integer number (464026337268).

Almost surely, 2^{1856016790361} is an apocalyptic number.

It is an amenable number.

1856016790361 is a deficient number, since it is larger than the sum of its proper divisors (88558711).

1856016790361 is an equidigital number, since it uses as much as digits as its factorization.

1856016790361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88558710.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 1856016790361 in words is "one trillion, eight hundred fifty-six billion, sixteen million, seven hundred ninety thousand, three hundred sixty-one".