5691881965 has 32 divisors (see below), whose sum is σ = 8963850240. Its totient is φ = 3361435200.

The previous prime is 5691881963. The next prime is 5691881969.

5691881965 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5691881965 - 2¹ = 5691881963 is a prime.

It is a super-2 number, since 2×5691881965² = 64795040606984522450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5691881963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381741 + ... + 396370.

It is an arithmetic number, because the mean of its divisors is an integer number (280120320).

Almost surely, 2^5691881965 is an apocalyptic number.

5691881965 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5691881965 is a deficient number, since it is larger than the sum of its proper divisors (3271968275).

5691881965 is a wasteful number, since it uses less digits than its factorization.

5691881965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778153.

The product of its digits is 4665600, while the sum is 58.

The square root of 5691881965 is about 75444.5621963571. The cubic root of 5691881965 is about 1785.4675511274.

The spelling of 5691881965 in words is "five billion, six hundred ninety-one million, eight hundred eighty-one thousand, nine hundred sixty-five".