27403324640 has 24 divisors (see below), whose sum is σ = 64740354840. Its totient is φ = 10961329792.

The previous prime is 27403324639. The next prime is 27403324643. The reversal of 27403324640 is 4642330472.

It is a super-2 number, since 2×27403324640² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27403324640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27403324643) 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, 85635230 + ... + 85635549.

It is an arithmetic number, because the mean of its divisors is an integer number (2697514785).

Almost surely, 2^27403324640 is an apocalyptic number.

27403324640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27403324640 is an abundant number, since it is smaller than the sum of its proper divisors (37337030200).

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

27403324640 is a wasteful number, since it uses less digits than its factorization.

27403324640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171270794 (or 171270786 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 35.

The spelling of 27403324640 in words is "twenty-seven billion, four hundred three million, three hundred twenty-four thousand, six hundred forty".