6553993556 has 18 divisors (see below), whose sum is σ = 12606959610. Its totient is φ = 2979087760.

The previous prime is 6553993547. The next prime is 6553993573.

6553993556 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 5191202500 + 1362791056 = 72050^2 + 36916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6770171 + ... + 6771138.

It is an arithmetic number, because the mean of its divisors is an integer number (700386645).

Almost surely, 2^6553993556 is an apocalyptic number.

It is an amenable number.

6553993556 is a deficient number, since it is larger than the sum of its proper divisors (6052966054).

6553993556 is a wasteful number, since it uses less digits than its factorization.

6553993556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13541335 (or 13541322 counting only the distinct ones).

The product of its digits is 16402500, while the sum is 56.

The square root of 6553993556 is about 80956.7387930122. The cubic root of 6553993556 is about 1871.4088114956.

The spelling of 6553993556 in words is "six billion, five hundred fifty-three million, nine hundred ninety-three thousand, five hundred fifty-six".