27366734640 has 640 divisors, whose sum is σ = 106064640000. Its totient is φ = 5695930368.

The previous prime is 27366734639. The next prime is 27366734671. The reversal of 27366734640 is 4643766372.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 27366734640.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 183669286 + ... + 183669434.

It is an arithmetic number, because the mean of its divisors is an integer number (165726000).

Almost surely, 2^27366734640 is an apocalyptic number.

27366734640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27366734640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53032320000).

27366734640 is an abundant number, since it is smaller than the sum of its proper divisors (78697905360).

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

27366734640 is a wasteful number, since it uses less digits than its factorization.

27366734640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 48.

It can be divided in two parts, 2736 and 6734640, that added together give a palindrome (6737376).

The spelling of 27366734640 in words is "twenty-seven billion, three hundred sixty-six million, seven hundred thirty-four thousand, six hundred forty".