1806740983951 has 4 divisors (see below), whose sum is σ = 1806747424504. Its totient is φ = 1806734543400.

The previous prime is 1806740983937. The next prime is 1806740983963. The reversal of 1806740983951 is 1593890476081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1806740983951 - 2⁷ = 1806740983823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1806740983951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806740983991) 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, 2779365 + ... + 3367246.

It is an arithmetic number, because the mean of its divisors is an integer number (451686856126).

Almost surely, 2^{1806740983951} is an apocalyptic number.

1806740983951 is a deficient number, since it is larger than the sum of its proper divisors (6440553).

1806740983951 is an equidigital number, since it uses as much as digits as its factorization.

1806740983951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440552.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 1806740983951 in words is "one trillion, eight hundred six billion, seven hundred forty million, nine hundred eighty-three thousand, nine hundred fifty-one".