8137805638 has 8 divisors (see below), whose sum is σ = 12213898200. Its totient is φ = 4066506240.

The previous prime is 8137805609. The next prime is 8137805639. The reversal of 8137805638 is 8365087318.

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

It is a junction number, because it is equal to n+sod(n) for n = 8137805591 and 8137805600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8137805639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194043 + ... + 1200838.

It is an arithmetic number, because the mean of its divisors is an integer number (1526737275).

Almost surely, 2^8137805638 is an apocalyptic number.

8137805638 is a deficient number, since it is larger than the sum of its proper divisors (4076092562).

8137805638 is a wasteful number, since it uses less digits than its factorization.

8137805638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396582.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 8137805638 is about 90209.7868193912. The cubic root of 8137805638 is about 2011.4184881670.

The spelling of 8137805638 in words is "eight billion, one hundred thirty-seven million, eight hundred five thousand, six hundred thirty-eight".