5638621242 has 16 divisors (see below), whose sum is σ = 11445560352. Its totient is φ = 1851487440.

The previous prime is 5638621229. The next prime is 5638621249. The reversal of 5638621242 is 2421268365.

It is a self number, because there is not a number n which added to its sum of digits gives 5638621242.

It is not an unprimeable number, because it can be changed into a prime (5638621249) 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, 7012809 + ... + 7013612.

It is an arithmetic number, because the mean of its divisors is an integer number (715347522).

Almost surely, 2^5638621242 is an apocalyptic number.

5638621242 is an abundant number, since it is smaller than the sum of its proper divisors (5806939110).

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

5638621242 is a wasteful number, since it uses less digits than its factorization.

5638621242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14026493.

The product of its digits is 138240, while the sum is 39.

The square root of 5638621242 is about 75090.7533721696. The cubic root of 5638621242 is about 1779.8810300067.

The spelling of 5638621242 in words is "five billion, six hundred thirty-eight million, six hundred twenty-one thousand, two hundred forty-two".