8378121514 has 16 divisors (see below), whose sum is σ = 14364883008. Its totient is φ = 3590026272.

The previous prime is 8378121511. The next prime is 8378121517. The reversal of 8378121514 is 4151218738.

It is an interprime number because it is at equal distance from previous prime (8378121511) and next prime (8378121517).

It is not an unprimeable number, because it can be changed into a prime (8378121511) 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 7 ways as a sum of consecutive naturals, for example, 43422 + ... + 136534.

It is an arithmetic number, because the mean of its divisors is an integer number (897805188).

Almost surely, 2^8378121514 is an apocalyptic number.

8378121514 is a deficient number, since it is larger than the sum of its proper divisors (5986761494).

8378121514 is a wasteful number, since it uses less digits than its factorization.

8378121514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99549.

The product of its digits is 53760, while the sum is 40.

The square root of 8378121514 is about 91532.0791526118. The cubic root of 8378121514 is about 2031.0263209583.

The spelling of 8378121514 in words is "eight billion, three hundred seventy-eight million, one hundred twenty-one thousand, five hundred fourteen".