8371711978 has 32 divisors (see below), whose sum is σ = 14623825536. Its totient is φ = 3520309248.

The previous prime is 8371711969. The next prime is 8371711979. The reversal of 8371711978 is 8791171738.

It is a happy number.

It is a super-2 number, since 2×8371711978² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8371711979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176025 + ... + 218467.

It is an arithmetic number, because the mean of its divisors is an integer number (456994548).

Almost surely, 2^8371711978 is an apocalyptic number.

8371711978 is a deficient number, since it is larger than the sum of its proper divisors (6252113558).

8371711978 is a wasteful number, since it uses less digits than its factorization.

8371711978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42718.

The product of its digits is 592704, while the sum is 52.

The square root of 8371711978 is about 91497.0599418364. The cubic root of 8371711978 is about 2030.5082550479.

The spelling of 8371711978 in words is "eight billion, three hundred seventy-one million, seven hundred eleven thousand, nine hundred seventy-eight".