2638468158 has 16 divisors (see below), whose sum is σ = 5278369536.
Its totient is φ = 879250520.
The previous prime is 2638468139. The next prime is 2638468177. The reversal of 2638468158 is 8518648362.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (2638468139) and next prime (2638468177).
It is a self number, because there is not a number n which added to its sum of digits gives 2638468158.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34998 + ... + 80633.
It is an arithmetic number, because the mean of its divisors is an integer number (329898096).
Almost surely, 22638468158 is an apocalyptic number.
2638468158 is an abundant number, since it is smaller than the sum of its proper divisors (2639901378).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2638468158 is a wasteful number, since it uses less digits than its factorization.
2638468158 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 119439.
The product of its digits is 2211840, while the sum is 51.
The square root of 2638468158 is about 51366.0214344074.
The cubic root of 2638468158 is about 1381.8172792188.
The spelling of 2638468158 in words is "two billion, six hundred thirty-eight million, four hundred sixty-eight thousand, one hundred fifty-eight".