278742006009 has 12 divisors (see below), whose sum is σ = 402637075776. Its totient is φ = 185823511512.

The previous prime is 278742006007. The next prime is 278742006031. The reversal of 278742006009 is 900600247872.

It is not a de Polignac number, because 278742006009 - 2¹ = 278742006007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (278742006001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 43084 + ... + 747890.

It is an arithmetic number, because the mean of its divisors is an integer number (33553089648).

Almost surely, 2^278742006009 is an apocalyptic number.

It is an amenable number.

278742006009 is a deficient number, since it is larger than the sum of its proper divisors (123895069767).

278742006009 is a wasteful number, since it uses less digits than its factorization.

278742006009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748756 (or 748753 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 278742006009 in words is "two hundred seventy-eight billion, seven hundred forty-two million, six thousand, nine".