5161818181615 has 16 divisors (see below), whose sum is σ = 6197867444736. Its totient is φ = 4126997952000.

The previous prime is 5161818181607. The next prime is 5161818181643.

It is a happy number.

5161818181615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5161818181615 - 2³ = 5161818181607 is a prime.

It is a super-3 number, since 3×5161818181615³ (a number of 39 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 104480359 + ... + 104529751.

It is an arithmetic number, because the mean of its divisors is an integer number (387366715296).

Almost surely, 2^{5161818181615} is an apocalyptic number.

5161818181615 is a deficient number, since it is larger than the sum of its proper divisors (1036049263121).

5161818181615 is a wasteful number, since it uses less digits than its factorization.

5161818181615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61410.

The product of its digits is 460800, while the sum is 52.

The spelling of 5161818181615 in words is "five trillion, one hundred sixty-one billion, eight hundred eighteen million, one hundred eighty-one thousand, six hundred fifteen".