1818291819201 has 32 divisors (see below), whose sum is σ = 2908834080768. Its totient is φ = 995583071040.

The previous prime is 1818291819193. The next prime is 1818291819221. The reversal of 1818291819201 is 1029181928181.

It is a happy number.

It is not a de Polignac number, because 1818291819201 - 2³ = 1818291819193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1818291819221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45069651 + ... + 45109976.

It is an arithmetic number, because the mean of its divisors is an integer number (90901065024).

Almost surely, 2^{1818291819201} is an apocalyptic number.

1818291819201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1818291819201 is a deficient number, since it is larger than the sum of its proper divisors (1090542261567).

1818291819201 is a wasteful number, since it uses less digits than its factorization.

1818291819201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90179701.

The product of its (nonzero) digits is 165888, while the sum is 51.

The spelling of 1818291819201 in words is "one trillion, eight hundred eighteen billion, two hundred ninety-one million, eight hundred nineteen thousand, two hundred one".