78963836987 has 8 divisors (see below), whose sum is σ = 90246164736. Its totient is φ = 67681954152.

The previous prime is 78963836953. The next prime is 78963836989.

78963836987 is nontrivially palindromic in base 10.

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 78963836987 - 2²² = 78959642683 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78963836989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475298 + ... + 619544.

It is an arithmetic number, because the mean of its divisors is an integer number (11280770592).

Almost surely, 2^78963836987 is an apocalyptic number.

78963836987 is a deficient number, since it is larger than the sum of its proper divisors (11282327749).

78963836987 is a wasteful number, since it uses less digits than its factorization.

78963836987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222457.

The product of its digits is 658409472, while the sum is 74.

The spelling of 78963836987 in words is "seventy-eight billion, nine hundred sixty-three million, eight hundred thirty-six thousand, nine hundred eighty-seven".