107638281891 has 32 divisors (see below), whose sum is σ = 182387166720. Its totient is φ = 61459510752.

The previous prime is 107638281859. The next prime is 107638281893. The reversal of 107638281891 is 198182836701.

107638281891 is a `hidden beast` number, since 10 + 76 + 382 + 8 + 189 + 1 = 666.

It is not a de Polignac number, because 107638281891 - 2⁵ = 107638281859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (107638281893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20541 + ... + 464433.

It is an arithmetic number, because the mean of its divisors is an integer number (5699598960).

Almost surely, 2^107638281891 is an apocalyptic number.

107638281891 is a deficient number, since it is larger than the sum of its proper divisors (74748884829).

107638281891 is a wasteful number, since it uses less digits than its factorization.

107638281891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445192 (or 445186 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 107638281891 in words is "one hundred seven billion, six hundred thirty-eight million, two hundred eighty-one thousand, eight hundred ninety-one".