2780278005550 has 24 divisors (see below), whose sum is σ = 5248500933816. Its totient is φ = 1095512526240.

The previous prime is 2780278005523. The next prime is 2780278005559. The reversal of 2780278005550 is 555008720872.

It is a junction number, because it is equal to n+sod(n) for n = 2780278005494 and 2780278005503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780278005559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414963517 + ... + 414970216.

It is an arithmetic number, because the mean of its divisors is an integer number (218687538909).

Almost surely, 2^{2780278005550} is an apocalyptic number.

2780278005550 is a deficient number, since it is larger than the sum of its proper divisors (2468222928266).

2780278005550 is a wasteful number, since it uses less digits than its factorization.

2780278005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829933812 (or 829933807 counting only the distinct ones).

The product of its (nonzero) digits is 1568000, while the sum is 49.

The spelling of 2780278005550 in words is "two trillion, seven hundred eighty billion, two hundred seventy-eight million, five thousand, five hundred fifty".