2782780005508 has 24 divisors (see below), whose sum is σ = 4888071581400. Its totient is φ = 1386189412608.

The previous prime is 2782780005479. The next prime is 2782780005541. The reversal of 2782780005508 is 8055000872872.

It can be written as a sum of positive squares in 4 ways, for example, as 150072561664 + 2632707443844 = 387392^2 + 1622562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8717178 + ... + 9030766.

It is an arithmetic number, because the mean of its divisors is an integer number (203669649225).

Almost surely, 2^{2782780005508} is an apocalyptic number.

It is an amenable number.

2782780005508 is a deficient number, since it is larger than the sum of its proper divisors (2105291575892).

2782780005508 is a wasteful number, since it uses less digits than its factorization.

2782780005508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321879 (or 321877 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 52.

The spelling of 2782780005508 in words is "two trillion, seven hundred eighty-two billion, seven hundred eighty million, five thousand, five hundred eight".