107785638787 has 4 divisors (see below), whose sum is σ = 107873341920. Its totient is φ = 107697935656.

The previous prime is 107785638743. The next prime is 107785638799. The reversal of 107785638787 is 787836587701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787836587701 = 179 ⋅4401321719.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107785638787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107785638487) 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, 43849723 + ... + 43852180.

It is an arithmetic number, because the mean of its divisors is an integer number (26968335480).

Almost surely, 2^107785638787 is an apocalyptic number.

107785638787 is a deficient number, since it is larger than the sum of its proper divisors (87703133).

107785638787 is an equidigital number, since it uses as much as digits as its factorization.

107785638787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87703132.

The product of its (nonzero) digits is 110638080, while the sum is 67.

The spelling of 107785638787 in words is "one hundred seven billion, seven hundred eighty-five million, six hundred thirty-eight thousand, seven hundred eighty-seven".