3556816947 has 16 divisors (see below), whose sum is σ = 5358672000. Its totient is φ = 2331020232.

The previous prime is 3556816937. The next prime is 3556816957. The reversal of 3556816947 is 7496186553.

3556816947 is a `hidden beast` number, since 3 + 556 + 81 + 6 + 9 + 4 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (3556816937) and next prime (3556816957).

It is not a de Polignac number, because 3556816947 - 2⁴ = 3556816931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3556816893 and 3556816902.

It is not an unprimeable number, because it can be changed into a prime (3556816937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114797 + ... + 1117982.

It is an arithmetic number, because the mean of its divisors is an integer number (334917000).

Almost surely, 2^3556816947 is an apocalyptic number.

3556816947 is a deficient number, since it is larger than the sum of its proper divisors (1801855053).

3556816947 is a wasteful number, since it uses less digits than its factorization.

3556816947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232847 (or 2232841 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 3556816947 is about 59639.0555508720. The cubic root of 3556816947 is about 1526.4661269919.

The spelling of 3556816947 in words is "three billion, five hundred fifty-six million, eight hundred sixteen thousand, nine hundred forty-seven".