27721992652 has 24 divisors (see below), whose sum is σ = 49472621856. Its totient is φ = 13589232768.

The previous prime is 27721992643. The next prime is 27721992653. The reversal of 27721992652 is 25629912772.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27721992652.

It is not an unprimeable number, because it can be changed into a prime (27721992653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235483 + ... + 333010.

It is an arithmetic number, because the mean of its divisors is an integer number (2061359244).

Almost surely, 2^27721992652 is an apocalyptic number.

It is an amenable number.

27721992652 is a deficient number, since it is larger than the sum of its proper divisors (21750629204).

27721992652 is a wasteful number, since it uses less digits than its factorization.

27721992652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568737 (or 568735 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The spelling of 27721992652 in words is "twenty-seven billion, seven hundred twenty-one million, nine hundred ninety-two thousand, six hundred fifty-two".