78903621984 has 96 divisors (see below), whose sum is σ = 228673839744. Its totient is φ = 23622087680.

The previous prime is 78903621983. The next prime is 78903621989. The reversal of 78903621984 is 48912630987.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78903621983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 362469 + ... + 537764.

It is an arithmetic number, because the mean of its divisors is an integer number (2382019164).

Almost surely, 2^78903621984 is an apocalyptic number.

It is an amenable number.

78903621984 is an abundant number, since it is smaller than the sum of its proper divisors (149770217760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78903621984 is a wasteful number, since it uses less digits than its factorization.

78903621984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900340 (or 900332 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 78903621984 in words is "seventy-eight billion, nine hundred three million, six hundred twenty-one thousand, nine hundred eighty-four".