8371991738 has 16 divisors (see below), whose sum is σ = 13775317920. Its totient is φ = 3784424400.

The previous prime is 8371991731. The next prime is 8371991779.

8371991738 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×8371991738² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8371991731) by changing a digit.

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, 1047248 + ... + 1055211.

It is an arithmetic number, because the mean of its divisors is an integer number (860957370).

Almost surely, 2^8371991738 is an apocalyptic number.

8371991738 is a deficient number, since it is larger than the sum of its proper divisors (5403326182).

8371991738 is a wasteful number, since it uses less digits than its factorization.

8371991738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102653.

The product of its digits is 2286144, while the sum is 56.

The square root of 8371991738 is about 91498.5887213568. The cubic root of 8371991738 is about 2030.5308728296.

The spelling of 8371991738 in words is "eight billion, three hundred seventy-one million, nine hundred ninety-one thousand, seven hundred thirty-eight".