638050165311 has 8 divisors (see below), whose sum is σ = 916174596400. Its totient is φ = 392646255552.

The previous prime is 638050165303. The next prime is 638050165321. The reversal of 638050165311 is 113561050836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 638050165311 - 2³ = 638050165303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 16360260649 = 638050165311 / (6 + 3 + 8 + 0 + 5 + 0 + 1 + 6 + 5 + 3 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 638050165311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638050165321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8180130286 + ... + 8180130363.

It is an arithmetic number, because the mean of its divisors is an integer number (114521824550).

Almost surely, 2^638050165311 is an apocalyptic number.

638050165311 is a deficient number, since it is larger than the sum of its proper divisors (278124431089).

638050165311 is a wasteful number, since it uses less digits than its factorization.

638050165311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16360260665.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 638050165311 in words is "six hundred thirty-eight billion, fifty million, one hundred sixty-five thousand, three hundred eleven".