8154121775 has 6 divisors (see below), whose sum is σ = 10111111032. Its totient is φ = 6523297400.

The previous prime is 8154121771. The next prime is 8154121817. The reversal of 8154121775 is 5771214518.

It is not a de Polignac number, because 8154121775 - 2² = 8154121771 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8154121771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163082411 + ... + 163082460.

It is an arithmetic number, because the mean of its divisors is an integer number (1685185172).

Almost surely, 2^8154121775 is an apocalyptic number.

8154121775 is a deficient number, since it is larger than the sum of its proper divisors (1956989257).

8154121775 is a wasteful number, since it uses less digits than its factorization.

8154121775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326164881 (or 326164876 counting only the distinct ones).

The product of its digits is 78400, while the sum is 41.

The square root of 8154121775 is about 90300.1759411354. The cubic root of 8154121775 is about 2012.7618753135.

The spelling of 8154121775 in words is "eight billion, one hundred fifty-four million, one hundred twenty-one thousand, seven hundred seventy-five".