27705765450 has 48 divisors (see below), whose sum is σ = 74956693536. Its totient is φ = 6716548800.

The previous prime is 27705765403. The next prime is 27705765463. The reversal of 27705765450 is 5456750772.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27705765450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8394037 + ... + 8397336.

It is an arithmetic number, because the mean of its divisors is an integer number (1561597782).

Almost surely, 2^27705765450 is an apocalyptic number.

27705765450 is an abundant number, since it is smaller than the sum of its proper divisors (47250928086).

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

27705765450 is a wasteful number, since it uses less digits than its factorization.

27705765450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16791399 (or 16791394 counting only the distinct ones).

The product of its (nonzero) digits is 2058000, while the sum is 48.

The spelling of 27705765450 in words is "twenty-seven billion, seven hundred five million, seven hundred sixty-five thousand, four hundred fifty".