27661506183640 has 96 divisors (see below), whose sum is σ = 74083474072080. Its totient is φ = 9263388089088.

The previous prime is 27661506183613. The next prime is 27661506183659. The reversal of 27661506183640 is 4638160516672.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164020527 + ... + 164189086.

Almost surely, 2^{27661506183640} is an apocalyptic number.

27661506183640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27661506183640 is an abundant number, since it is smaller than the sum of its proper divisors (46421967888440).

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

27661506183640 is a wasteful number, since it uses less digits than its factorization.

27661506183640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328209681 (or 328209670 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 27661506183640 in words is "twenty-seven trillion, six hundred sixty-one billion, five hundred six million, one hundred eighty-three thousand, six hundred forty".