3771221641 has 12 divisors (see below), whose sum is σ = 4278948352. Its totient is φ = 3317787000.

The previous prime is 3771221621. The next prime is 3771221677. The reversal of 3771221641 is 1461221773.

It is not a de Polignac number, because 3771221641 - 2¹¹ = 3771219593 is a prime.

It is a super-2 number, since 2×3771221641² = 28444225331093465762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3771221597 and 3771221606.

It is not an unprimeable number, because it can be changed into a prime (3771221621) 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, 498945 + ... + 506446.

Almost surely, 2^3771221641 is an apocalyptic number.

3771221641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3771221641 is a deficient number, since it is larger than the sum of its proper divisors (507726711).

3771221641 is a wasteful number, since it uses less digits than its factorization.

3771221641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005444 (or 1005433 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 3771221641 is about 61410.2730900946. The cubic root of 3771221641 is about 1556.5414340504.

The spelling of 3771221641 in words is "three billion, seven hundred seventy-one million, two hundred twenty-one thousand, six hundred forty-one".