2046181861 has 4 divisors (see below), whose sum is σ = 2046560800. Its totient is φ = 2045802924.

The previous prime is 2046181853. The next prime is 2046181871. The reversal of 2046181861 is 1681816402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2046181861 - 2³ = 2046181853 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 2046181861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2046181811) 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, 181251 + ... + 192208.

It is an arithmetic number, because the mean of its divisors is an integer number (511640200).

Almost surely, 2^2046181861 is an apocalyptic number.

It is an amenable number.

2046181861 is a deficient number, since it is larger than the sum of its proper divisors (378939).

2046181861 is an equidigital number, since it uses as much as digits as its factorization.

2046181861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378938.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2046181861 is about 45234.7417479088. The cubic root of 2046181861 is about 1269.5449339906.

The spelling of 2046181861 in words is "two billion, forty-six million, one hundred eighty-one thousand, eight hundred sixty-one".