2164237680 has 80 divisors (see below), whose sum is σ = 7319067264. Its totient is φ = 524663040.

The previous prime is 2164237657. The next prime is 2164237703. The reversal of 2164237680 is 867324612.

It is a happy number.

2164237680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2164237657) and next prime (2164237703).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407254 + ... + 412533.

Almost surely, 2^2164237680 is an apocalyptic number.

2164237680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164237680 is an abundant number, since it is smaller than the sum of its proper divisors (5154829584).

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

2164237680 is a wasteful number, since it uses less digits than its factorization.

2164237680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819814 (or 819808 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 2164237680 is about 46521.3679936435. The cubic root of 2164237680 is about 1293.5056140878.

The spelling of 2164237680 in words is "two billion, one hundred sixty-four million, two hundred thirty-seven thousand, six hundred eighty".