27690721632 has 108 divisors (see below), whose sum is σ = 91601942796. Its totient is φ = 7911630720.

The previous prime is 27690721627. The next prime is 27690721633. The reversal of 27690721632 is 23612709672.

27690721632 is a `hidden beast` number, since 2 + 7 + 6 + 9 + 0 + 7 + 2 + 1 + 632 = 666.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27690721633) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 966994 + ... + 995217.

It is an arithmetic number, because the mean of its divisors is an integer number (848166137).

Almost surely, 2^27690721632 is an apocalyptic number.

It is an amenable number.

27690721632 is an abundant number, since it is smaller than the sum of its proper divisors (63911221164).

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

27690721632 is a wasteful number, since it uses less digits than its factorization.

27690721632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962241 (or 1962223 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 27690721632 in words is "twenty-seven billion, six hundred ninety million, seven hundred twenty-one thousand, six hundred thirty-two".