78557297481312 has 48 divisors (see below), whose sum is σ = 222075437114160. Its totient is φ = 24171476147712.

The previous prime is 78557297481281. The next prime is 78557297481337. The reversal of 78557297481312 is 21318479275587.

78557297481312 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31473274987 + ... + 31473277482.

It is an arithmetic number, because the mean of its divisors is an integer number (4626571606545).

Almost surely, 2^{78557297481312} is an apocalyptic number.

It is an amenable number.

78557297481312 is an abundant number, since it is smaller than the sum of its proper divisors (143518139632848).

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

78557297481312 is a wasteful number, since it uses less digits than its factorization.

78557297481312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62946552495 (or 62946552487 counting only the distinct ones).

The product of its digits is 237081600, while the sum is 69.

The spelling of 78557297481312 in words is "seventy-eight trillion, five hundred fifty-seven billion, two hundred ninety-seven million, four hundred eighty-one thousand, three hundred twelve".