78315432776 has 16 divisors (see below), whose sum is σ = 167818784640. Its totient is φ = 33563756880.

The previous prime is 78315432763. The next prime is 78315432817. The reversal of 78315432776 is 67723451387.

It is a super-2 number, since 2×78315432776² (a number of 23 digits) contains 22 as substring.

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, 699244880 + ... + 699244991.

It is an arithmetic number, because the mean of its divisors is an integer number (10488674040).

Almost surely, 2^78315432776 is an apocalyptic number.

It is an amenable number.

78315432776 is an abundant number, since it is smaller than the sum of its proper divisors (89503351864).

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

78315432776 is a wasteful number, since it uses less digits than its factorization.

78315432776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398489884 (or 1398489880 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 53.

The spelling of 78315432776 in words is "seventy-eight billion, three hundred fifteen million, four hundred thirty-two thousand, seven hundred seventy-six".