2164136240 has 80 divisors (see below), whose sum is σ = 6000473088. Its totient is φ = 709724928.

The previous prime is 2164136239. The next prime is 2164136267. The reversal of 2164136240 is 426314612.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71132 + ... + 96891.

Almost surely, 2^2164136240 is an apocalyptic number.

2164136240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164136240 is an abundant number, since it is smaller than the sum of its proper divisors (3836336848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2164136240 is a wasteful number, since it uses less digits than its factorization.

2164136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168066 (or 168060 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2164136240 is about 46520.2777291796. The cubic root of 2164136240 is about 1293.4854044684.

The spelling of 2164136240 in words is "two billion, one hundred sixty-four million, one hundred thirty-six thousand, two hundred forty".