1818291109201 has 16 divisors (see below), whose sum is σ = 2093345831808. Its totient is φ = 1547096140800.

The previous prime is 1818291109171. The next prime is 1818291109211. The reversal of 1818291109201 is 1029011928181.

It is not a de Polignac number, because 1818291109201 - 2⁷ = 1818291109073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1818291109211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836935 + ... + 2082556.

It is an arithmetic number, because the mean of its divisors is an integer number (130834114488).

Almost surely, 2^{1818291109201} is an apocalyptic number.

It is an amenable number.

1818291109201 is a deficient number, since it is larger than the sum of its proper divisors (275054722607).

1818291109201 is a wasteful number, since it uses less digits than its factorization.

1818291109201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920152.

The product of its (nonzero) digits is 20736, while the sum is 43.

The spelling of 1818291109201 in words is "one trillion, eight hundred eighteen billion, two hundred ninety-one million, one hundred nine thousand, two hundred one".