3771221640 has 64 divisors (see below), whose sum is σ = 11385783360. Its totient is φ = 999248640.

The previous prime is 3771221621. The next prime is 3771221677. The reversal of 3771221640 is 461221773.

It is a super-2 number, since 2×3771221640² = 28444225316008579200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81246 + ... + 118925.

It is an arithmetic number, because the mean of its divisors is an integer number (177902865).

Almost surely, 2^3771221640 is an apocalyptic number.

3771221640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3771221640 is an abundant number, since it is smaller than the sum of its proper divisors (7614561720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3771221640 is a wasteful number, since it uses less digits than its factorization.

3771221640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200342 (or 200338 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 3771221640 is about 61410.2730819527. The cubic root of 3771221640 is about 1556.5414339128.

The spelling of 3771221640 in words is "three billion, seven hundred seventy-one million, two hundred twenty-one thousand, six hundred forty".