27061507664 has 20 divisors (see below), whose sum is σ = 55515887604. Its totient is φ = 12734827008.

The previous prime is 27061507657. The next prime is 27061507679. The reversal of 27061507664 is 46670516072.

It can be written as a sum of positive squares in 2 ways, for example, as 14694288400 + 12367219264 = 121220^2 + 111208^2 .

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 3 ways as a sum of consecutive naturals, for example, 49745147 + ... + 49745690.

Almost surely, 2^27061507664 is an apocalyptic number.

It is an amenable number.

27061507664 is an abundant number, since it is smaller than the sum of its proper divisors (28454379940).

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

27061507664 is a wasteful number, since it uses less digits than its factorization.

27061507664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99490862 (or 99490856 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 27061507664 in words is "twenty-seven billion, sixty-one million, five hundred seven thousand, six hundred sixty-four".