2169640368 has 120 divisors (see below), whose sum is σ = 7347663648. Its totient is φ = 583428096.

The previous prime is 2169640321. The next prime is 2169640387. The reversal of 2169640368 is 8630469612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46171 + ... + 80442.

Almost surely, 2^2169640368 is an apocalyptic number.

2169640368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2169640368 is an abundant number, since it is smaller than the sum of its proper divisors (5178023280).

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

2169640368 is a wasteful number, since it uses less digits than its factorization.

2169640368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126651 (or 126642 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 2169640368 is about 46579.3985362628. The cubic root of 2169640368 is about 1294.5810659220.

The spelling of 2169640368 in words is "two billion, one hundred sixty-nine million, six hundred forty thousand, three hundred sixty-eight".