3961041381 has 24 divisors (see below), whose sum is σ = 6247743840. Its totient is φ = 2398284000.

The previous prime is 3961041379. The next prime is 3961041421. The reversal of 3961041381 is 1831401693.

3961041381 is a `hidden beast` number, since 3 + 9 + 610 + 4 + 1 + 38 + 1 = 666.

3961041381 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3961041381 - 2¹ = 3961041379 is a prime.

It is a super-2 number, since 2×3961041381² = 31379697643988774322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961041311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85015 + ... + 123083.

It is an arithmetic number, because the mean of its divisors is an integer number (260322660).

Almost surely, 2^3961041381 is an apocalyptic number.

It is an amenable number.

3961041381 is a deficient number, since it is larger than the sum of its proper divisors (2286702459).

3961041381 is a wasteful number, since it uses less digits than its factorization.

3961041381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39137 (or 39134 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 3961041381 is about 62936.8046615015. The cubic root of 3961041381 is about 1582.2306500841.

The spelling of 3961041381 in words is "three billion, nine hundred sixty-one million, forty-one thousand, three hundred eighty-one".