78041687628 has 24 divisors (see below), whose sum is σ = 182246933232. Its totient is φ = 25992515584.

The previous prime is 78041687623. The next prime is 78041687639. The reversal of 78041687628 is 82678614087.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78041687621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2657325 + ... + 2686532.

It is an arithmetic number, because the mean of its divisors is an integer number (7593622218).

Almost surely, 2^78041687628 is an apocalyptic number.

It is an amenable number.

78041687628 is an abundant number, since it is smaller than the sum of its proper divisors (104205245604).

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

78041687628 is a wasteful number, since it uses less digits than its factorization.

78041687628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345081 (or 5345079 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 57.

The spelling of 78041687628 in words is "seventy-eight billion, forty-one million, six hundred eighty-seven thousand, six hundred twenty-eight".