9780552636 has 24 divisors (see below), whose sum is σ = 22894209744. Its totient is φ = 3249767040.

The previous prime is 9780552631. The next prime is 9780552647. The reversal of 9780552636 is 6362550879.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780552631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298235 + ... + 1305746.

It is an arithmetic number, because the mean of its divisors is an integer number (953925406).

Almost surely, 2^9780552636 is an apocalyptic number.

It is an amenable number.

9780552636 is an abundant number, since it is smaller than the sum of its proper divisors (13113657108).

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

9780552636 is a wasteful number, since it uses less digits than its factorization.

9780552636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604301 (or 2604299 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 9780552636 is about 98896.6765670111. The cubic root of 9780552636 is about 2138.5584838877.

The spelling of 9780552636 in words is "nine billion, seven hundred eighty million, five hundred fifty-two thousand, six hundred thirty-six".