27794502640 has 40 divisors (see below), whose sum is σ = 68023391760. Its totient is φ = 10532653056.

The previous prime is 27794502611. The next prime is 27794502707. The reversal of 27794502640 is 4620549772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9141409 + ... + 9144448.

It is an arithmetic number, because the mean of its divisors is an integer number (1700584794).

Almost surely, 2^27794502640 is an apocalyptic number.

27794502640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27794502640 is an abundant number, since it is smaller than the sum of its proper divisors (40228889120).

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

27794502640 is a wasteful number, since it uses less digits than its factorization.

27794502640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18285889 (or 18285883 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 27794502640 in words is "twenty-seven billion, seven hundred ninety-four million, five hundred two thousand, six hundred forty".