278020086122 has 4 divisors (see below), whose sum is σ = 417030129186. Its totient is φ = 139010043060.

The previous prime is 278020086103. The next prime is 278020086139. The reversal of 278020086122 is 221680020872.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 239462443801 + 38557642321 = 489349^2 + 196361^2 .

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 as a sum of consecutive naturals, namely, 69505021529 + ... + 69505021532.

Almost surely, 2^278020086122 is an apocalyptic number.

278020086122 is a deficient number, since it is larger than the sum of its proper divisors (139010043064).

278020086122 is a wasteful number, since it uses less digits than its factorization.

278020086122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139010043063.

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 278020086122 in words is "two hundred seventy-eight billion, twenty million, eighty-six thousand, one hundred twenty-two".