3946991633901 has 12 divisors (see below), whose sum is σ = 5885120142720. Its totient is φ = 2546446215240.

The previous prime is 3946991633869. The next prime is 3946991633987. The reversal of 3946991633901 is 1093361996493.

3946991633901 is a `hidden beast` number, since 3 + 9 + 469 + 9 + 163 + 3 + 9 + 0 + 1 = 666.

It is not a de Polignac number, because 3946991633901 - 2⁵ = 3946991633869 is a prime.

It is a super-2 number, since 2×3946991633901² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946991653901) 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, 7073461431 + ... + 7073461988.

It is an arithmetic number, because the mean of its divisors is an integer number (490426678560).

Almost surely, 2^{3946991633901} is an apocalyptic number.

3946991633901 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3946991633901 is a deficient number, since it is larger than the sum of its proper divisors (1938128508819).

3946991633901 is a wasteful number, since it uses less digits than its factorization.

3946991633901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146923456 (or 14146923453 counting only the distinct ones).

The product of its (nonzero) digits is 25509168, while the sum is 63.

The spelling of 3946991633901 in words is "three trillion, nine hundred forty-six billion, nine hundred ninety-one million, six hundred thirty-three thousand, nine hundred one".