638822240486 has 4 divisors (see below), whose sum is σ = 958233360732. Its totient is φ = 319411120242.

The previous prime is 638822240453. The next prime is 638822240599. The reversal of 638822240486 is 684042228836.

638822240486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159705560120 + ... + 159705560123.

It is an arithmetic number, because the mean of its divisors is an integer number (239558340183).

Almost surely, 2^638822240486 is an apocalyptic number.

638822240486 is a deficient number, since it is larger than the sum of its proper divisors (319411120246).

638822240486 is a wasteful number, since it uses less digits than its factorization.

638822240486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319411120245.

The product of its (nonzero) digits is 7077888, while the sum is 53.

The spelling of 638822240486 in words is "six hundred thirty-eight billion, eight hundred twenty-two million, two hundred forty thousand, four hundred eighty-six".