78510973072 has 20 divisors (see below), whose sum is σ = 173845726336. Its totient is φ = 33647559840.

The previous prime is 78510973003. The next prime is 78510973091. The reversal of 78510973072 is 27037901587.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350495304 + ... + 350495527.

Almost surely, 2^78510973072 is an apocalyptic number.

It is an amenable number.

78510973072 is an abundant number, since it is smaller than the sum of its proper divisors (95334753264).

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

78510973072 is a wasteful number, since it uses less digits than its factorization.

78510973072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700990846 (or 700990840 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 78510973072 in words is "seventy-eight billion, five hundred ten million, nine hundred seventy-three thousand, seventy-two".