3564376621 has 32 divisors (see below), whose sum is σ = 4253534208. Its totient is φ = 2955294720.

The previous prime is 3564376601. The next prime is 3564376667. The reversal of 3564376621 is 1266734653.

It is a cyclic number.

It is not a de Polignac number, because 3564376621 - 2¹³ = 3564368429 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3564376601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 496560 + ... + 503686.

It is an arithmetic number, because the mean of its divisors is an integer number (132922944).

Almost surely, 2^3564376621 is an apocalyptic number.

3564376621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3564376621 is a deficient number, since it is larger than the sum of its proper divisors (689157587).

3564376621 is a wasteful number, since it uses less digits than its factorization.

3564376621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261.

The product of its digits is 544320, while the sum is 43.

The square root of 3564376621 is about 59702.4004626280. The cubic root of 3564376621 is about 1527.5468142725.

The spelling of 3564376621 in words is "three billion, five hundred sixty-four million, three hundred seventy-six thousand, six hundred twenty-one".