2164653381 has 16 divisors (see below), whose sum is σ = 3200205888. Its totient is φ = 1290403200.

The previous prime is 2164653319. The next prime is 2164653437. The reversal of 2164653381 is 1833564612.

It is not a de Polignac number, because 2164653381 - 2²⁶ = 2097544517 is a prime.

It is a super-2 number, since 2×2164653381² = 9371448519749462322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164653581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535656 + ... + 539681.

It is an arithmetic number, because the mean of its divisors is an integer number (200012868).

Almost surely, 2^2164653381 is an apocalyptic number.

It is an amenable number.

2164653381 is a deficient number, since it is larger than the sum of its proper divisors (1035552507).

2164653381 is a wasteful number, since it uses less digits than its factorization.

2164653381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075412.

The product of its digits is 103680, while the sum is 39.

The square root of 2164653381 is about 46525.8356292501. The cubic root of 2164653381 is about 1293.5884264885.

The spelling of 2164653381 in words is "two billion, one hundred sixty-four million, six hundred fifty-three thousand, three hundred eighty-one".