4261639894 has 8 divisors (see below), whose sum is σ = 6399921528. Its totient is φ = 2128332720.

The previous prime is 4261639819. The next prime is 4261639933. The reversal of 4261639894 is 4989361624.

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

It is a super-2 number, since 2×4261639894² = 36323149172264662472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241472 + ... + 1244899.

It is an arithmetic number, because the mean of its divisors is an integer number (799990191).

Almost surely, 2^4261639894 is an apocalyptic number.

4261639894 is a deficient number, since it is larger than the sum of its proper divisors (2138281634).

4261639894 is a wasteful number, since it uses less digits than its factorization.

4261639894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487230.

The product of its digits is 2239488, while the sum is 52.

The square root of 4261639894 is about 65281.2369214922. The cubic root of 4261639894 is about 1621.2833267057.

The spelling of 4261639894 in words is "four billion, two hundred sixty-one million, six hundred thirty-nine thousand, eight hundred ninety-four".