2151594864 has 60 divisors (see below), whose sum is σ = 6065485296. Its totient is φ = 711956736.

The previous prime is 2151594839. The next prime is 2151594877. The reversal of 2151594864 is 4684951512.

2151594864 is a `hidden beast` number, since 2 + 1 + 51 + 594 + 8 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34804 + ... + 74259.

Almost surely, 2^2151594864 is an apocalyptic number.

2151594864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2151594864 is an abundant number, since it is smaller than the sum of its proper divisors (3913890432).

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

2151594864 is a wasteful number, since it uses less digits than its factorization.

2151594864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109214 (or 109205 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 2151594864 is about 46385.2871501298. The cubic root of 2151594864 is about 1290.9819385026.

The spelling of 2151594864 in words is "two billion, one hundred fifty-one million, five hundred ninety-four thousand, eight hundred sixty-four".