2067891864 has 64 divisors (see below), whose sum is σ = 5395528800. Its totient is φ = 659613696.

The previous prime is 2067891811. The next prime is 2067891907. The reversal of 2067891864 is 4681987602.

It is a super-2 number, since 2×2067891864² = 8552353522394788992, which contains 22 as substring.

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, 65502 + ... + 91794.

Almost surely, 2^2067891864 is an apocalyptic number.

2067891864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2067891864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2697764400).

2067891864 is an abundant number, since it is smaller than the sum of its proper divisors (3327636936).

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

2067891864 is a wasteful number, since it uses less digits than its factorization.

2067891864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26444 (or 26440 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 2067891864 is about 45474.0790341047. The cubic root of 2067891864 is about 1274.0191074652.

The spelling of 2067891864 in words is "two billion, sixty-seven million, eight hundred ninety-one thousand, eight hundred sixty-four".