4687778691 has 40 divisors (see below), whose sum is σ = 7164049904. Its totient is φ = 3053868480.

The previous prime is 4687778681. The next prime is 4687778699. The reversal of 4687778691 is 1968777864.

4687778691 is a `hidden beast` number, since 468 + 7 + 7 + 7 + 86 + 91 = 666.

It is not a de Polignac number, because 4687778691 - 2²³ = 4679390083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4687778699) 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 39 ways as a sum of consecutive naturals, for example, 772716 + ... + 778758.

Almost surely, 2^4687778691 is an apocalyptic number.

4687778691 is a deficient number, since it is larger than the sum of its proper divisors (2476271213).

4687778691 is a wasteful number, since it uses less digits than its factorization.

4687778691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6273 (or 6264 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The square root of 4687778691 is about 68467.3549291924. The cubic root of 4687778691 is about 1673.6155416483.

The spelling of 4687778691 in words is "four billion, six hundred eighty-seven million, seven hundred seventy-eight thousand, six hundred ninety-one".