2616268681 has 8 divisors (see below), whose sum is σ = 2856117320. Its totient is φ = 2381933952.

The previous prime is 2616268679. The next prime is 2616268687. The reversal of 2616268681 is 1868626162.

It can be written as a sum of positive squares in 4 ways, for example, as 44156025 + 2572112656 = 6645^2 + 50716^2 .

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 2616268681 - 2¹ = 2616268679 is a prime.

It is a super-2 number, since 2×2616268681² = 13689723622362959522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2616268687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1377486 + ... + 1379383.

It is an arithmetic number, because the mean of its divisors is an integer number (357014665).

Almost surely, 2^2616268681 is an apocalyptic number.

It is an amenable number.

2616268681 is a deficient number, since it is larger than the sum of its proper divisors (239848639).

2616268681 is a wasteful number, since it uses less digits than its factorization.

2616268681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756955.

The product of its digits is 331776, while the sum is 46.

The square root of 2616268681 is about 51149.4739073629. The cubic root of 2616268681 is about 1377.9309259678.

The spelling of 2616268681 in words is "two billion, six hundred sixteen million, two hundred sixty-eight thousand, six hundred eighty-one".