78287779288 has 16 divisors (see below), whose sum is σ = 147077982000. Its totient is φ = 39066984096.

The previous prime is 78287779249. The next prime is 78287779301. The reversal of 78287779288 is 88297778287.

It is a super-2 number, since 2×78287779288² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78287779288.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 9608868 + ... + 9617011.

It is an arithmetic number, because the mean of its divisors is an integer number (9192373875).

Almost surely, 2^78287779288 is an apocalyptic number.

It is an amenable number.

78287779288 is a deficient number, since it is larger than the sum of its proper divisors (68790202712).

78287779288 is a wasteful number, since it uses less digits than its factorization.

78287779288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19226394 (or 19226390 counting only the distinct ones).

The product of its digits is 354041856, while the sum is 73.

The spelling of 78287779288 in words is "seventy-eight billion, two hundred eighty-seven million, seven hundred seventy-nine thousand, two hundred eighty-eight".