4639903723681 has 8 divisors (see below), whose sum is σ = 4828033102464. Its totient is φ = 4455499679280.

The previous prime is 4639903723667. The next prime is 4639903723709. The reversal of 4639903723681 is 1863273099364.

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 4639903723681 - 2¹¹ = 4639903721633 is a prime.

It is a super-2 number, since 2×4639903723681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4639903723621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 931331055 + ... + 931336036.

It is an arithmetic number, because the mean of its divisors is an integer number (603504137808).

Almost surely, 2^{4639903723681} is an apocalyptic number.

It is an amenable number.

4639903723681 is a deficient number, since it is larger than the sum of its proper divisors (188129378783).

4639903723681 is a wasteful number, since it uses less digits than its factorization.

4639903723681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862667191.

The product of its (nonzero) digits is 35271936, while the sum is 61.

The spelling of 4639903723681 in words is "four trillion, six hundred thirty-nine billion, nine hundred three million, seven hundred twenty-three thousand, six hundred eighty-one".