27657020004 has 12 divisors (see below), whose sum is σ = 64533046704. Its totient is φ = 9219006664.

The previous prime is 27657019969. The next prime is 27657020057. The reversal of 27657020004 is 40002075672.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152375822 + ... + 1152375845.

It is an arithmetic number, because the mean of its divisors is an integer number (5377753892).

Almost surely, 2^27657020004 is an apocalyptic number.

It is an amenable number.

27657020004 is an abundant number, since it is smaller than the sum of its proper divisors (36876026700).

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

27657020004 is a wasteful number, since it uses less digits than its factorization.

27657020004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304751674 (or 2304751672 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

Adding to 27657020004 its reverse (40002075672), we get a palindrome (67659095676).

The spelling of 27657020004 in words is "twenty-seven billion, six hundred fifty-seven million, twenty thousand, four".