6553788994 has 4 divisors (see below), whose sum is σ = 9830683494. Its totient is φ = 3276894496.

The previous prime is 6553788991. The next prime is 6553789009. The reversal of 6553788994 is 4998873556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5518558369 + 1035230625 = 74287^2 + 32175^2 .

It is not an unprimeable number, because it can be changed into a prime (6553788991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1638447247 + ... + 1638447250.

Almost surely, 2^6553788994 is an apocalyptic number.

6553788994 is a deficient number, since it is larger than the sum of its proper divisors (3276894500).

6553788994 is a wasteful number, since it uses less digits than its factorization.

6553788994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276894499.

The product of its digits is 65318400, while the sum is 64.

The square root of 6553788994 is about 80955.4753799890. The cubic root of 6553788994 is about 1871.3893412745.

The spelling of 6553788994 in words is "six billion, five hundred fifty-three million, seven hundred eighty-eight thousand, nine hundred ninety-four".