1813011361291 has 32 divisors (see below), whose sum is σ = 2044623329280. Its totient is φ = 1596219609600.

The previous prime is 1813011361277. The next prime is 1813011361313. The reversal of 1813011361291 is 1921631103181.

It is a cyclic number.

It is not a de Polignac number, because 1813011361291 - 2¹³ = 1813011353099 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 1813011361291.

It is not an unprimeable number, because it can be changed into a prime (1813011361691) 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, 13950451 + ... + 14079811.

It is an arithmetic number, because the mean of its divisors is an integer number (63894479040).

Almost surely, 2^{1813011361291} is an apocalyptic number.

1813011361291 is a deficient number, since it is larger than the sum of its proper divisors (231611967989).

1813011361291 is a wasteful number, since it uses less digits than its factorization.

1813011361291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129907.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 1813011361291 in words is "one trillion, eight hundred thirteen billion, eleven million, three hundred sixty-one thousand, two hundred ninety-one".