5161817664 has 84 divisors (see below), whose sum is σ = 15343443024. Its totient is φ = 1720600704.

The previous prime is 5161817641. The next prime is 5161817669. The reversal of 5161817664 is 4667181615.

5161817664 is a `hidden beast` number, since 516 + 1 + 8 + 1 + 76 + 64 = 666.

It is not an unprimeable number, because it can be changed into a prime (5161817669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150402 + ... + 181505.

It is an arithmetic number, because the mean of its divisors is an integer number (182660036).

Almost surely, 2^5161817664 is an apocalyptic number.

5161817664 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

5161817664 is an abundant number, since it is smaller than the sum of its proper divisors (10181625360).

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

5161817664 is an equidigital number, since it uses as much as digits as its factorization.

5161817664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331934 (or 331912 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 5161817664 is about 71845.7908579201. The cubic root of 5161817664 is about 1728.2274006289.

The spelling of 5161817664 in words is "five billion, one hundred sixty-one million, eight hundred seventeen thousand, six hundred sixty-four".