6121887687 has 8 divisors (see below), whose sum is σ = 9069463280. Its totient is φ = 4081258440.

The previous prime is 6121887643. The next prime is 6121887691. The reversal of 6121887687 is 7867881216.

It is a happy number.

6121887687 is a `hidden beast` number, since 612 + 18 + 8 + 7 + 6 + 8 + 7 = 666.

It is not a de Polignac number, because 6121887687 - 2¹⁰ = 6121886663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6121887587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113368264 + ... + 113368317.

It is an arithmetic number, because the mean of its divisors is an integer number (1133682910).

Almost surely, 2^6121887687 is an apocalyptic number.

6121887687 is a deficient number, since it is larger than the sum of its proper divisors (2947575593).

6121887687 is a wasteful number, since it uses less digits than its factorization.

6121887687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226736590 (or 226736584 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 6121887687 is about 78242.4928475569. The cubic root of 6121887687 is about 1829.3429003366.

The spelling of 6121887687 in words is "six billion, one hundred twenty-one million, eight hundred eighty-seven thousand, six hundred eighty-seven".