5636644542 has 24 divisors (see below), whose sum is σ = 12931126416. Its totient is φ = 1768358976.

The previous prime is 5636644513. The next prime is 5636644589. The reversal of 5636644542 is 2454466365.

It is a happy number.

5636644542 is a `hidden beast` number, since 5 + 6 + 3 + 66 + 44 + 542 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9209898 + ... + 9210509.

It is an arithmetic number, because the mean of its divisors is an integer number (538796934).

Almost surely, 2^5636644542 is an apocalyptic number.

5636644542 is an abundant number, since it is smaller than the sum of its proper divisors (7294481874).

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

5636644542 is a wasteful number, since it uses less digits than its factorization.

5636644542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18420432 (or 18420429 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 45.

The square root of 5636644542 is about 75077.5901451292. The cubic root of 5636644542 is about 1779.6730180425.

The spelling of 5636644542 in words is "five billion, six hundred thirty-six million, six hundred forty-four thousand, five hundred forty-two".