3213602987556 has 48 divisors (see below), whose sum is σ = 8075380947200. Its totient is φ = 988779681792.

The previous prime is 3213602987537. The next prime is 3213602987611. The reversal of 3213602987556 is 6557892063123.

It is a junction number, because it is equal to n+sod(n) for n = 3213602987496 and 3213602987505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8054340 + ... + 8443908.

Almost surely, 2^{3213602987556} is an apocalyptic number.

It is an amenable number.

3213602987556 is an abundant number, since it is smaller than the sum of its proper divisors (4861777959644).

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

3213602987556 is a wasteful number, since it uses less digits than its factorization.

3213602987556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442468 (or 442466 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 57.

The spelling of 3213602987556 in words is "three trillion, two hundred thirteen billion, six hundred two million, nine hundred eighty-seven thousand, five hundred fifty-six".