278353353057 has 16 divisors (see below), whose sum is σ = 399697529280. Its totient is φ = 171289801152.

The previous prime is 278353353037. The next prime is 278353353071. The reversal of 278353353057 is 750353353872.

It is not a de Polignac number, because 278353353057 - 2⁶ = 278353352993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278353353037) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1931419 + ... + 2070527.

It is an arithmetic number, because the mean of its divisors is an integer number (24981095580).

Almost surely, 2^278353353057 is an apocalyptic number.

It is an amenable number.

278353353057 is a deficient number, since it is larger than the sum of its proper divisors (121344176223).

278353353057 is a wasteful number, since it uses less digits than its factorization.

278353353057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190432.

The product of its (nonzero) digits is 7938000, while the sum is 51.

The spelling of 278353353057 in words is "two hundred seventy-eight billion, three hundred fifty-three million, three hundred fifty-three thousand, fifty-seven".