27665621952 has 28 divisors (see below), whose sum is σ = 73198625256. Its totient is φ = 9221873920.

The previous prime is 27665621923. The next prime is 27665621987. The reversal of 27665621952 is 25912656672.

It is a happy number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 27665621895 and 27665621904.

It is a congruent number.

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, 72045699 + ... + 72046082.

Almost surely, 2^27665621952 is an apocalyptic number.

It is an amenable number.

27665621952 is an abundant number, since it is smaller than the sum of its proper divisors (45533003304).

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

27665621952 is a wasteful number, since it uses less digits than its factorization.

27665621952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144091796 (or 144091786 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 27665621952 in words is "twenty-seven billion, six hundred sixty-five million, six hundred twenty-one thousand, nine hundred fifty-two".