78921681430 has 8 divisors (see below), whose sum is σ = 142059026592. Its totient is φ = 31568672568.

The previous prime is 78921681413. The next prime is 78921681493. The reversal of 78921681430 is 3418612987.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3946084062 + ... + 3946084081.

It is an arithmetic number, because the mean of its divisors is an integer number (17757378324).

Almost surely, 2^78921681430 is an apocalyptic number.

78921681430 is a deficient number, since it is larger than the sum of its proper divisors (63137345162).

78921681430 is a wasteful number, since it uses less digits than its factorization.

78921681430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7892168150.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 78921681430 in words is "seventy-eight billion, nine hundred twenty-one million, six hundred eighty-one thousand, four hundred thirty".