6161768656 has 20 divisors (see below), whose sum is σ = 12261088132. Its totient is φ = 2997616896.

The previous prime is 6161768653. The next prime is 6161768689. The reversal of 6161768656 is 6568671616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4019560000 + 2142208656 = 63400^2 + 46284^2 .

It is a super-3 number, since 3×6161768656³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6161768653) 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, 5203605 + ... + 5204788.

Almost surely, 2^6161768656 is an apocalyptic number.

It is an amenable number.

6161768656 is a deficient number, since it is larger than the sum of its proper divisors (6099319476).

6161768656 is a wasteful number, since it uses less digits than its factorization.

6161768656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408438 (or 10408432 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 6161768656 is about 78496.9340547769. The cubic root of 6161768656 is about 1833.3067166457.

The spelling of 6161768656 in words is "six billion, one hundred sixty-one million, seven hundred sixty-eight thousand, six hundred fifty-six".