5161661615 has 8 divisors (see below), whose sum is σ = 6757084368. Its totient is φ = 3753935680.

The previous prime is 5161661597. The next prime is 5161661623.

5161661615 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5161661615 - 2⁸ = 5161661359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46924142 + ... + 46924251.

It is an arithmetic number, because the mean of its divisors is an integer number (844635546).

Almost surely, 2^5161661615 is an apocalyptic number.

5161661615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5161661615 is a deficient number, since it is larger than the sum of its proper divisors (1595422753).

5161661615 is a wasteful number, since it uses less digits than its factorization.

5161661615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93848409.

The product of its digits is 32400, while the sum is 38.

The square root of 5161661615 is about 71844.7048501140. The cubic root of 5161661615 is about 1728.2099848726.

The spelling of 5161661615 in words is "five billion, one hundred sixty-one million, six hundred sixty-one thousand, six hundred fifteen".