278390012011 has 4 divisors (see below), whose sum is σ = 278494554672. Its totient is φ = 278285469352.

The previous prime is 278390012009. The next prime is 278390012027. The reversal of 278390012011 is 110210093872.

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

It is a cyclic number.

It is not a de Polignac number, because 278390012011 - 2¹ = 278390012009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278390012111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52267336 + ... + 52272661.

It is an arithmetic number, because the mean of its divisors is an integer number (69623638668).

Almost surely, 2^278390012011 is an apocalyptic number.

278390012011 is a deficient number, since it is larger than the sum of its proper divisors (104542661).

278390012011 is a wasteful number, since it uses less digits than its factorization.

278390012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104542660.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 278390012011 in words is "two hundred seventy-eight billion, three hundred ninety million, twelve thousand, eleven".