4640564381 has 8 divisors (see below), whose sum is σ = 4671072000. Its totient is φ = 4610129040.

The previous prime is 4640564371. The next prime is 4640564399. The reversal of 4640564381 is 1834650464.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4640564381 is a prime.

It is a super-2 number, since 2×4640564381² = 43069675548411826322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4640564371) 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, 113900 + ... + 149178.

It is an arithmetic number, because the mean of its divisors is an integer number (583884000).

Almost surely, 2^4640564381 is an apocalyptic number.

It is an amenable number.

4640564381 is a deficient number, since it is larger than the sum of its proper divisors (30507619).

4640564381 is a wasteful number, since it uses less digits than its factorization.

4640564381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36139.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 4640564381 is about 68121.6880369240. The cubic root of 4640564381 is about 1667.9778051102.

The spelling of 4640564381 in words is "four billion, six hundred forty million, five hundred sixty-four thousand, three hundred eighty-one".