78518521250 has 160 divisors (see below), whose sum is σ = 174107767680. Its totient is φ = 26269056000.

The previous prime is 78518521243. The next prime is 78518521261. The reversal of 78518521250 is 5212581587.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7095722 + ... + 7106778.

It is an arithmetic number, because the mean of its divisors is an integer number (1088173548).

Almost surely, 2^78518521250 is an apocalyptic number.

78518521250 is an abundant number, since it is smaller than the sum of its proper divisors (95589246430).

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

78518521250 is a wasteful number, since it uses less digits than its factorization.

78518521250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134 (or 11119 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 44.

The spelling of 78518521250 in words is "seventy-eight billion, five hundred eighteen million, five hundred twenty-one thousand, two hundred fifty".