1818374728291 has 8 divisors (see below), whose sum is σ = 2017303243200. Its totient is φ = 1625049833640.

The previous prime is 1818374728283. The next prime is 1818374728301. The reversal of 1818374728291 is 1928274738181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1818374728291 - 2³ = 1818374728283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1818374728201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400904381 + ... + 1400905678.

It is an arithmetic number, because the mean of its divisors is an integer number (252162905400).

Almost surely, 2^{1818374728291} is an apocalyptic number.

1818374728291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1818374728291 is a deficient number, since it is larger than the sum of its proper divisors (198928514909).

1818374728291 is a wasteful number, since it uses less digits than its factorization.

1818374728291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801810129.

The product of its digits is 10838016, while the sum is 61.

The spelling of 1818374728291 in words is "one trillion, eight hundred eighteen billion, three hundred seventy-four million, seven hundred twenty-eight thousand, two hundred ninety-one".