78884306635631 has 8 divisors (see below), whose sum is σ = 90153569326080. Its totient is φ = 67615062952248.

The previous prime is 78884306635621. The next prime is 78884306635649. The reversal of 78884306635631 is 13653660348887.

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

It is not a de Polignac number, because 78884306635631 - 2³⁸ = 78609428728687 is a prime.

It is a super-2 number, since 2×78884306635631² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78884306635621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663630 + ... + 13778436.

It is an arithmetic number, because the mean of its divisors is an integer number (11269196165760).

Almost surely, 2^{78884306635631} is an apocalyptic number.

78884306635631 is a deficient number, since it is larger than the sum of its proper divisors (11269262690449).

78884306635631 is a wasteful number, since it uses less digits than its factorization.

78884306635631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503533.

The product of its (nonzero) digits is 418037760, while the sum is 68.

The spelling of 78884306635631 in words is "seventy-eight trillion, eight hundred eighty-four billion, three hundred six million, six hundred thirty-five thousand, six hundred thirty-one".