27780252780500 has 96 divisors (see below), whose sum is σ = 70081110223488. Its totient is φ = 9507680064000.

The previous prime is 27780252780473. The next prime is 27780252780563. The reversal of 27780252780500 is 508725208772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148464002 + ... + 148651001.

It is an arithmetic number, because the mean of its divisors is an integer number (730011564828).

Almost surely, 2^{27780252780500} is an apocalyptic number.

27780252780500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27780252780500 is an abundant number, since it is smaller than the sum of its proper divisors (42300857442988).

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

27780252780500 is a wasteful number, since it uses less digits than its factorization.

27780252780500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297115050 (or 297115038 counting only the distinct ones).

The product of its (nonzero) digits is 4390400, while the sum is 53.

The spelling of 27780252780500 in words is "twenty-seven trillion, seven hundred eighty billion, two hundred fifty-two million, seven hundred eighty thousand, five hundred".