4688861391 has 16 divisors (see below), whose sum is σ = 6948052320. Its totient is φ = 3125191680.

The previous prime is 4688861357. The next prime is 4688861431. The reversal of 4688861391 is 1931688864.

4688861391 is a `hidden beast` number, since 468 + 8 + 86 + 13 + 91 = 666.

It is not a de Polignac number, because 4688861391 - 2⁶ = 4688861327 is a prime.

It is a super-2 number, since 2×4688861391² = 43970842288020909762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4688868391) 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 15 ways as a sum of consecutive naturals, for example, 117421 + ... + 152201.

It is an arithmetic number, because the mean of its divisors is an integer number (434253270).

Almost surely, 2^4688861391 is an apocalyptic number.

4688861391 is a deficient number, since it is larger than the sum of its proper divisors (2259190929).

4688861391 is a wasteful number, since it uses less digits than its factorization.

4688861391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39783 (or 39777 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 4688861391 is about 68475.2611605096. The cubic root of 4688861391 is about 1673.7443790772.

The spelling of 4688861391 in words is "four billion, six hundred eighty-eight million, eight hundred sixty-one thousand, three hundred ninety-one".