8145981774 has 48 divisors (see below), whose sum is σ = 20582671200. Its totient is φ = 2327421600.

The previous prime is 8145981761. The next prime is 8145981787. The reversal of 8145981774 is 4771895418.

It is an interprime number because it is at equal distance from previous prime (8145981761) and next prime (8145981787).

It is a self number, because there is not a number n which added to its sum of digits gives 8145981774.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 653527 + ... + 665874.

It is an arithmetic number, because the mean of its divisors is an integer number (428805650).

Almost surely, 2^8145981774 is an apocalyptic number.

8145981774 is an abundant number, since it is smaller than the sum of its proper divisors (12436689426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8145981774 is a wasteful number, since it uses less digits than its factorization.

8145981774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319430 (or 1319413 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 8145981774 is about 90255.0927870555. The cubic root of 8145981774 is about 2012.0918935549.

The spelling of 8145981774 in words is "eight billion, one hundred forty-five million, nine hundred eighty-one thousand, seven hundred seventy-four".