78255502786 has 16 divisors (see below), whose sum is σ = 119382706080. Its totient is φ = 38461377600.

The previous prime is 78255502763. The next prime is 78255502799. The reversal of 78255502786 is 68720555287.

It is a super-2 number, since 2×78255502786² (a number of 23 digits) contains 22 as substring.

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, 2084986 + ... + 2122186.

It is an arithmetic number, because the mean of its divisors is an integer number (7461419130).

Almost surely, 2^78255502786 is an apocalyptic number.

78255502786 is a deficient number, since it is larger than the sum of its proper divisors (41127203294).

78255502786 is a wasteful number, since it uses less digits than its factorization.

78255502786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55089.

The product of its (nonzero) digits is 9408000, while the sum is 55.

The spelling of 78255502786 in words is "seventy-eight billion, two hundred fifty-five million, five hundred two thousand, seven hundred eighty-six".