2180812605 has 16 divisors (see below), whose sum is σ = 3489899904. Its totient is φ = 1162900160.

The previous prime is 2180812603. The next prime is 2180812607. The reversal of 2180812605 is 5062180812.

It is an interprime number because it is at equal distance from previous prime (2180812603) and next prime (2180812607).

It is not a de Polignac number, because 2180812605 - 2¹ = 2180812603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180812603) 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, 130432 + ... + 146198.

It is an arithmetic number, because the mean of its divisors is an integer number (218118744).

Almost surely, 2^2180812605 is an apocalyptic number.

It is an amenable number.

2180812605 is a deficient number, since it is larger than the sum of its proper divisors (1309087299).

2180812605 is a wasteful number, since it uses less digits than its factorization.

2180812605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24996.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 2180812605 is about 46699.1713523913. The cubic root of 2180812605 is about 1296.7993462463.

The spelling of 2180812605 in words is "two billion, one hundred eighty million, eight hundred twelve thousand, six hundred five".