3787821564 has 48 divisors (see below), whose sum is σ = 8908750368. Its totient is φ = 1252562688.

The previous prime is 3787821517. The next prime is 3787821643. The reversal of 3787821564 is 4651287873.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605874 + ... + 1608230.

It is an arithmetic number, because the mean of its divisors is an integer number (185598966).

Almost surely, 2^3787821564 is an apocalyptic number.

It is an amenable number.

3787821564 is an abundant number, since it is smaller than the sum of its proper divisors (5120928804).

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

3787821564 is a wasteful number, since it uses less digits than its factorization.

3787821564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374 (or 3372 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 3787821564 is about 61545.2805989216. The cubic root of 3787821564 is about 1558.8219195687.

The spelling of 3787821564 in words is "three billion, seven hundred eighty-seven million, eight hundred twenty-one thousand, five hundred sixty-four".