1807094349721 has 4 divisors (see below), whose sum is σ = 1810023190452. Its totient is φ = 1804165508992.

The previous prime is 1807094349707. The next prime is 1807094349799. The reversal of 1807094349721 is 1279434907081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 735196494096 + 1071897855625 = 857436^2 + 1035325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1807094349721 - 2¹¹ = 1807094347673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1807094343721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464419440 + ... + 1464420673.

It is an arithmetic number, because the mean of its divisors is an integer number (452505797613).

Almost surely, 2^{1807094349721} is an apocalyptic number.

It is an amenable number.

1807094349721 is a deficient number, since it is larger than the sum of its proper divisors (2928840731).

1807094349721 is an equidigital number, since it uses as much as digits as its factorization.

1807094349721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928840730.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 1807094349721 in words is "one trillion, eight hundred seven billion, ninety-four million, three hundred forty-nine thousand, seven hundred twenty-one".