27780550005534 has 32 divisors (see below), whose sum is σ = 55664900282880. Its totient is φ = 9242888477952.

The previous prime is 27780550005529. The next prime is 27780550005583. The reversal of 27780550005534 is 43550005508772.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20884827 + ... + 22175145.

It is an arithmetic number, because the mean of its divisors is an integer number (1739528133840).

Almost surely, 2^{27780550005534} is an apocalyptic number.

27780550005534 is an abundant number, since it is smaller than the sum of its proper divisors (27884350277346).

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

27780550005534 is a wasteful number, since it uses less digits than its factorization.

27780550005534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297024.

The product of its (nonzero) digits is 5880000, while the sum is 51.

The spelling of 27780550005534 in words is "twenty-seven trillion, seven hundred eighty billion, five hundred fifty million, five thousand, five hundred thirty-four".