27740545540 has 12 divisors (see below), whose sum is σ = 58255145676. Its totient is φ = 11096218208.

The previous prime is 27740545513. The next prime is 27740545541. The reversal of 27740545540 is 4554504772.

It can be written as a sum of positive squares in 2 ways, for example, as 3173744896 + 24566800644 = 56336^2 + 156738^2 .

It is not an unprimeable number, because it can be changed into a prime (27740545541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693513619 + ... + 693513658.

It is an arithmetic number, because the mean of its divisors is an integer number (4854595473).

Almost surely, 2^27740545540 is an apocalyptic number.

27740545540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27740545540 is an abundant number, since it is smaller than the sum of its proper divisors (30514600136).

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

27740545540 is a wasteful number, since it uses less digits than its factorization.

27740545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387027286 (or 1387027284 counting only the distinct ones).

The product of its (nonzero) digits is 784000, while the sum is 43.

The spelling of 27740545540 in words is "twenty-seven billion, seven hundred forty million, five hundred forty-five thousand, five hundred forty".