5161500661 has 8 divisors (see below), whose sum is σ = 5317974144. Its totient is φ = 5006971200.

The previous prime is 5161500647. The next prime is 5161500683. The reversal of 5161500661 is 1660051615.

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

It is a cyclic number.

It is not a de Polignac number, because 5161500661 - 2²⁹ = 4624629749 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 (5161500691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480615 + ... + 491236.

It is an arithmetic number, because the mean of its divisors is an integer number (664746768).

Almost surely, 2^5161500661 is an apocalyptic number.

It is an amenable number.

5161500661 is a deficient number, since it is larger than the sum of its proper divisors (156473483).

5161500661 is a wasteful number, since it uses less digits than its factorization.

5161500661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972011.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 5161500661 is about 71843.5846892400. The cubic root of 5161500661 is about 1728.1920213289.

The spelling of 5161500661 in words is "five billion, one hundred sixty-one million, five hundred thousand, six hundred sixty-one".