4001911381 has 12 divisors (see below), whose sum is σ = 4521845088. Its totient is φ = 3533456784.

The previous prime is 4001911373. The next prime is 4001911391. The reversal of 4001911381 is 1831191004.

It is not a de Polignac number, because 4001911381 - 2³ = 4001911373 is a prime.

It is a super-2 number, since 2×4001911381² = 32030589402754654322, which 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 (4001911301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510895 + ... + 518668.

It is an arithmetic number, because the mean of its divisors is an integer number (376820424).

Almost surely, 2^4001911381 is an apocalyptic number.

It is an amenable number.

4001911381 is a deficient number, since it is larger than the sum of its proper divisors (519933707).

4001911381 is a wasteful number, since it uses less digits than its factorization.

4001911381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029612 (or 1029599 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 4001911381 is about 63260.6621922344. The cubic root of 4001911381 is about 1587.6538557230.

The spelling of 4001911381 in words is "four billion, one million, nine hundred eleven thousand, three hundred eighty-one".