1516506161 has 8 divisors (see below), whose sum is σ = 1578831144. Its totient is φ = 1455304320.

The previous prime is 1516506149. The next prime is 1516506169. The reversal of 1516506161 is 1616056151.

It can be written as a sum of positive squares in 4 ways, for example, as 809743936 + 706762225 = 28456^2 + 26585^2 .

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 1516506161 - 2²⁶ = 1449397297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1516506169) 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, 278030 + ... + 283431.

It is an arithmetic number, because the mean of its divisors is an integer number (197353893).

Almost surely, 2^1516506161 is an apocalyptic number.

It is an amenable number.

1516506161 is a deficient number, since it is larger than the sum of its proper divisors (62324983).

1516506161 is an equidigital number, since it uses as much as digits as its factorization.

1516506161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561571.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1516506161 is about 38942.3440614455. The cubic root of 1516506161 is about 1148.8977872785.

The spelling of 1516506161 in words is "one billion, five hundred sixteen million, five hundred six thousand, one hundred sixty-one".