27687627640 has 32 divisors (see below), whose sum is σ = 65575962000. Its totient is φ = 10492153344.

The previous prime is 27687627607. The next prime is 27687627641. The reversal of 27687627640 is 4672678672.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27687627641) 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, 18214785 + ... + 18216304.

Almost surely, 2^27687627640 is an apocalyptic number.

27687627640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27687627640 is an abundant number, since it is smaller than the sum of its proper divisors (37888334360).

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

27687627640 is a wasteful number, since it uses less digits than its factorization.

27687627640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36431119 (or 36431115 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 27687627640 in words is "twenty-seven billion, six hundred eighty-seven million, six hundred twenty-seven thousand, six hundred forty".