4081900639 has 4 divisors (see below), whose sum is σ = 4082061024. Its totient is φ = 4081740256.

The previous prime is 4081900637. The next prime is 4081900649. The reversal of 4081900639 is 9360091804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4081900639 - 2¹ = 4081900637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081900637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32602 + ... + 96055.

It is an arithmetic number, because the mean of its divisors is an integer number (1020515256).

Almost surely, 2^4081900639 is an apocalyptic number.

4081900639 is a deficient number, since it is larger than the sum of its proper divisors (160385).

4081900639 is a wasteful number, since it uses less digits than its factorization.

4081900639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160384.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 4081900639 is about 63889.7537872858. The cubic root of 4081900639 is about 1598.1620351899.

The spelling of 4081900639 in words is "four billion, eighty-one million, nine hundred thousand, six hundred thirty-nine".