27730997574 has 48 divisors (see below), whose sum is σ = 64690238448. Its totient is φ = 7901869248.

The previous prime is 27730997519. The next prime is 27730997611. The reversal of 27730997574 is 47579903772.

It is a congruent number.

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, 16777 + ... + 236100.

It is an arithmetic number, because the mean of its divisors is an integer number (1347713301).

Almost surely, 2^27730997574 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27730997574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32345119224).

27730997574 is an abundant number, since it is smaller than the sum of its proper divisors (36959240874).

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

27730997574 is a wasteful number, since it uses less digits than its factorization.

27730997574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253269 (or 253262 counting only the distinct ones).

The product of its (nonzero) digits is 23337720, while the sum is 60.

The spelling of 27730997574 in words is "twenty-seven billion, seven hundred thirty million, nine hundred ninety-seven thousand, five hundred seventy-four".