6961881969 has 12 divisors (see below), whose sum is σ = 11492630656. Its totient is φ = 3978218232.

The previous prime is 6961881931. The next prime is 6961881989. The reversal of 6961881969 is 9691881696.

6961881969 is a `hidden beast` number, since 6 + 9 + 618 + 8 + 1 + 9 + 6 + 9 = 666.

It is not a de Polignac number, because 6961881969 - 2¹¹ = 6961879921 is a prime.

It is a super-2 number, since 2×6961881969² = 96935601100574633922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 110506063 = 6961881969 / (6 + 9 + 6 + 1 + 8 + 8 + 1 + 9 + 6 + 9).

6961881969 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6961881989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55252969 + ... + 55253094.

Almost surely, 2^6961881969 is an apocalyptic number.

It is an amenable number.

6961881969 is a deficient number, since it is larger than the sum of its proper divisors (4530748687).

6961881969 is a wasteful number, since it uses less digits than its factorization.

6961881969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110506076 (or 110506073 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 6961881969 is about 83437.8928844683. The cubic root of 6961881969 is about 1909.4526148115.

The spelling of 6961881969 in words is "six billion, nine hundred sixty-one million, eight hundred eighty-one thousand, nine hundred sixty-nine".