8161884705 has 64 divisors (see below), whose sum is σ = 14998798080. Its totient is φ = 3754377216.

The previous prime is 8161884629. The next prime is 8161884713. The reversal of 8161884705 is 5074881618.

It is a happy number.

It is not a de Polignac number, because 8161884705 - 2²¹ = 8159787553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 451929 + ... + 469641.

It is an arithmetic number, because the mean of its divisors is an integer number (234356220).

Almost surely, 2^8161884705 is an apocalyptic number.

8161884705 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8161884705 is a deficient number, since it is larger than the sum of its proper divisors (6836913375).

8161884705 is a wasteful number, since it uses less digits than its factorization.

8161884705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17890.

The product of its (nonzero) digits is 430080, while the sum is 48.

The square root of 8161884705 is about 90343.1497403096. The cubic root of 8161884705 is about 2013.4004061144.

The spelling of 8161884705 in words is "eight billion, one hundred sixty-one million, eight hundred eighty-four thousand, seven hundred five".