78226266778 has 16 divisors (see below), whose sum is σ = 128044312704. Its totient is φ = 35546923360.

The previous prime is 78226266763. The next prime is 78226266827. The reversal of 78226266778 is 87766262287.

It is a super-2 number, since 2×78226266778² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 446875 + ... + 596782.

It is an arithmetic number, because the mean of its divisors is an integer number (8002769544).

Almost surely, 2^78226266778 is an apocalyptic number.

78226266778 is a deficient number, since it is larger than the sum of its proper divisors (49818045926).

78226266778 is a wasteful number, since it uses less digits than its factorization.

78226266778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047077.

The product of its digits is 37933056, while the sum is 61.

The spelling of 78226266778 in words is "seventy-eight billion, two hundred twenty-six million, two hundred sixty-six thousand, seven hundred seventy-eight".