78490855780 has 48 divisors (see below), whose sum is σ = 166209696576. Its totient is φ = 31134741120.

The previous prime is 78490855727. The next prime is 78490855829. The reversal of 78490855780 is 8755809487.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1177135 + ... + 1242025.

It is an arithmetic number, because the mean of its divisors is an integer number (3462702012).

Almost surely, 2^78490855780 is an apocalyptic number.

It is an amenable number.

78490855780 is an abundant number, since it is smaller than the sum of its proper divisors (87718840796).

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

78490855780 is a wasteful number, since it uses less digits than its factorization.

78490855780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65404 (or 65402 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 61.

The spelling of 78490855780 in words is "seventy-eight billion, four hundred ninety million, eight hundred fifty-five thousand, seven hundred eighty".