8145981775 has 12 divisors (see below), whose sum is σ = 10122120000. Its totient is φ = 6503170880.

The previous prime is 8145981761. The next prime is 8145981787. The reversal of 8145981775 is 5771895418.

It is not a de Polignac number, because 8145981775 - 2¹⁹ = 8145457487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328150 + ... + 352099.

It is an arithmetic number, because the mean of its divisors is an integer number (843510000).

Almost surely, 2^8145981775 is an apocalyptic number.

8145981775 is a deficient number, since it is larger than the sum of its proper divisors (1976138225).

8145981775 is a wasteful number, since it uses less digits than its factorization.

8145981775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680738 (or 680733 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 55.

The square root of 8145981775 is about 90255.0927925954. The cubic root of 8145981775 is about 2012.0918936372.

The spelling of 8145981775 in words is "eight billion, one hundred forty-five million, nine hundred eighty-one thousand, seven hundred seventy-five".