278997093243 has 24 divisors (see below), whose sum is σ = 439698435696. Its totient is φ = 169063512000.

The previous prime is 278997093187. The next prime is 278997093281. The reversal of 278997093243 is 342390799872.

It is not a de Polignac number, because 278997093243 - 2⁸ = 278997092987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278997093443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 453121 + ... + 873677.

It is an arithmetic number, because the mean of its divisors is an integer number (18320768154).

Almost surely, 2^278997093243 is an apocalyptic number.

278997093243 is a deficient number, since it is larger than the sum of its proper divisors (160701342453).

278997093243 is a wasteful number, since it uses less digits than its factorization.

278997093243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427275 (or 427272 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 278997093243 in words is "two hundred seventy-eight billion, nine hundred ninety-seven million, ninety-three thousand, two hundred forty-three".