8154239705 has 16 divisors (see below), whose sum is σ = 9861499200. Its totient is φ = 6472509120.

The previous prime is 8154239701. The next prime is 8154239707. The reversal of 8154239705 is 5079324518.

It is not a de Polignac number, because 8154239705 - 2² = 8154239701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8154239701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1762295 + ... + 1766915.

It is an arithmetic number, because the mean of its divisors is an integer number (616343700).

Almost surely, 2^8154239705 is an apocalyptic number.

It is an amenable number.

8154239705 is a deficient number, since it is larger than the sum of its proper divisors (1707259495).

8154239705 is a wasteful number, since it uses less digits than its factorization.

8154239705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7304.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 8154239705 is about 90300.8289275353. The cubic root of 8154239705 is about 2012.7715785397.

The spelling of 8154239705 in words is "eight billion, one hundred fifty-four million, two hundred thirty-nine thousand, seven hundred five".