2164477881 has 8 divisors (see below), whose sum is σ = 2887998624. Its totient is φ = 1441971200.

The previous prime is 2164477873. The next prime is 2164477907. The reversal of 2164477881 is 1887744612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2164477881 - 2³ = 2164477873 is a prime.

It is a super-2 number, since 2×2164477881² = 9369928994676500322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2164477881.

It is not an unprimeable number, because it can be changed into a prime (2164477811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248520 + ... + 257081.

It is an arithmetic number, because the mean of its divisors is an integer number (360999828).

Almost surely, 2^2164477881 is an apocalyptic number.

It is an amenable number.

2164477881 is a deficient number, since it is larger than the sum of its proper divisors (723520743).

2164477881 is a wasteful number, since it uses less digits than its factorization.

2164477881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507031.

The product of its digits is 602112, while the sum is 48.

The square root of 2164477881 is about 46523.9495421444. The cubic root of 2164477881 is about 1293.5534661716.

The spelling of 2164477881 in words is "two billion, one hundred sixty-four million, four hundred seventy-seven thousand, eight hundred eighty-one".