27726651616 has 24 divisors (see below), whose sum is σ = 56960187984. Its totient is φ = 13260572160.

The previous prime is 27726651611. The next prime is 27726651629. The reversal of 27726651616 is 61615662772.

It is a super-2 number, since 2×27726651616² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27726651616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27726651611) 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, 18835305 + ... + 18836776.

It is an arithmetic number, because the mean of its divisors is an integer number (2373341166).

Almost surely, 2^27726651616 is an apocalyptic number.

It is an amenable number.

27726651616 is an abundant number, since it is smaller than the sum of its proper divisors (29233536368).

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

27726651616 is a wasteful number, since it uses less digits than its factorization.

27726651616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37672114 (or 37672106 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 49.

The spelling of 27726651616 in words is "twenty-seven billion, seven hundred twenty-six million, six hundred fifty-one thousand, six hundred sixteen".