78778032522 has 64 divisors (see below), whose sum is σ = 189615360000. Its totient is φ = 21315026880.

The previous prime is 78778032511. The next prime is 78778032539. The reversal of 78778032522 is 22523087787.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2175747 + ... + 2211657.

It is an arithmetic number, because the mean of its divisors is an integer number (2962740000).

Almost surely, 2^78778032522 is an apocalyptic number.

78778032522 is an abundant number, since it is smaller than the sum of its proper divisors (110837327478).

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

78778032522 is a wasteful number, since it uses less digits than its factorization.

78778032522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38691.

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 78778032522 in words is "seventy-eight billion, seven hundred seventy-eight million, thirty-two thousand, five hundred twenty-two".