4003344372581 has 16 divisors (see below), whose sum is σ = 4350527961600. Its totient is φ = 3669839524800.

The previous prime is 4003344372553. The next prime is 4003344372607. The reversal of 4003344372581 is 1852734433004.

It is a cyclic number.

It is not a de Polignac number, because 4003344372581 - 2³⁸ = 3728466465637 is a prime.

It is a super-2 number, since 2×4003344372581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4003344372541) 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, 4331471 + ... + 5173811.

It is an arithmetic number, because the mean of its divisors is an integer number (271907997600).

Almost surely, 2^{4003344372581} is an apocalyptic number.

It is an amenable number.

4003344372581 is a deficient number, since it is larger than the sum of its proper divisors (347183589019).

4003344372581 is a wasteful number, since it uses less digits than its factorization.

4003344372581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850460.

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 4003344372581 in words is "four trillion, three billion, three hundred forty-four million, three hundred seventy-two thousand, five hundred eighty-one".