78853767491 has 8 divisors (see below), whose sum is σ = 83018685120. Its totient is φ = 74690321832.

The previous prime is 78853767467. The next prime is 78853767511. The reversal of 78853767491 is 19476735887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78853767491 - 2³⁰ = 77780025667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78853767791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257165 + ... + 473118.

It is an arithmetic number, because the mean of its divisors is an integer number (10377335640).

Almost surely, 2^78853767491 is an apocalyptic number.

78853767491 is a deficient number, since it is larger than the sum of its proper divisors (4164917629).

78853767491 is a wasteful number, since it uses less digits than its factorization.

78853767491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735985.

The product of its digits is 71124480, while the sum is 65.

The spelling of 78853767491 in words is "seventy-eight billion, eight hundred fifty-three million, seven hundred sixty-seven thousand, four hundred ninety-one".