5161616501 has 4 divisors (see below), whose sum is σ = 5162407404. Its totient is φ = 5160825600.

The previous prime is 5161616491. The next prime is 5161616557. The reversal of 5161616501 is 1056161615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 749335876 + 4412280625 = 27374^2 + 66425^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161616501 - 2²⁶ = 5094507637 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 (5161616561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385580 + ... + 398741.

It is an arithmetic number, because the mean of its divisors is an integer number (1290601851).

Almost surely, 2^5161616501 is an apocalyptic number.

It is an amenable number.

5161616501 is a deficient number, since it is larger than the sum of its proper divisors (790903).

5161616501 is an equidigital number, since it uses as much as digits as its factorization.

5161616501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790902.

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

The square root of 5161616501 is about 71844.3908805691. The cubic root of 5161616501 is about 1728.2049498859.

The spelling of 5161616501 in words is "five billion, one hundred sixty-one million, six hundred sixteen thousand, five hundred one".