2780000275278 has 64 divisors (see below), whose sum is σ = 6107880614400. Its totient is φ = 839617384320.

The previous prime is 2780000275277. The next prime is 2780000275289. The reversal of 2780000275278 is 8725720000872.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780000275277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21617208 + ... + 21745428.

It is an arithmetic number, because the mean of its divisors is an integer number (95435634600).

Almost surely, 2^{2780000275278} is an apocalyptic number.

2780000275278 is an abundant number, since it is smaller than the sum of its proper divisors (3327880339122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2780000275278 is a wasteful number, since it uses less digits than its factorization.

2780000275278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136537.

The product of its (nonzero) digits is 878080, while the sum is 48.

The spelling of 2780000275278 in words is "two trillion, seven hundred eighty billion, two hundred seventy-five thousand, two hundred seventy-eight".