3556748734821 has 16 divisors (see below), whose sum is σ = 5579213702400. Its totient is φ = 2231685480384.

The previous prime is 3556748734817. The next prime is 3556748734829. The reversal of 3556748734821 is 1284378476553.

It is a happy number.

3556748734821 is a `hidden beast` number, since 3 + 5 + 5 + 6 + 74 + 87 + 3 + 482 + 1 = 666.

It is not a de Polignac number, because 3556748734821 - 2² = 3556748734817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3556748734829) 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, 3874453501 + ... + 3874454418.

It is an arithmetic number, because the mean of its divisors is an integer number (348700856400).

Almost surely, 2^{3556748734821} is an apocalyptic number.

It is an amenable number.

3556748734821 is a deficient number, since it is larger than the sum of its proper divisors (2022464967579).

3556748734821 is a wasteful number, since it uses less digits than its factorization.

3556748734821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7748907945 (or 7748907939 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 63.

The spelling of 3556748734821 in words is "three trillion, five hundred fifty-six billion, seven hundred forty-eight million, seven hundred thirty-four thousand, eight hundred twenty-one".