78281055690 has 32 divisors (see below), whose sum is σ = 187891958016. Its totient is φ = 20873012160.

The previous prime is 78281055689. The next prime is 78281055731. The reversal of 78281055690 is 9655018287.

It is a super-2 number, since 2×78281055690² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223984 + ... + 454676.

It is an arithmetic number, because the mean of its divisors is an integer number (5871623688).

Almost surely, 2^78281055690 is an apocalyptic number.

78281055690 is an abundant number, since it is smaller than the sum of its proper divisors (109610902326).

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

78281055690 is a wasteful number, since it uses less digits than its factorization.

78281055690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242014.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 78281055690 in words is "seventy-eight billion, two hundred eighty-one million, fifty-five thousand, six hundred ninety".