27212047640 has 32 divisors (see below), whose sum is σ = 61231822560. Its totient is φ = 10883980800.

The previous prime is 27212047637. The next prime is 27212047649. The reversal of 27212047640 is 4674021272.

It is a self number, because there is not a number n which added to its sum of digits gives 27212047640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27212047649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936125 + ... + 964755.

It is an arithmetic number, because the mean of its divisors is an integer number (1913494455).

Almost surely, 2^27212047640 is an apocalyptic number.

27212047640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27212047640 is an abundant number, since it is smaller than the sum of its proper divisors (34019774920).

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

27212047640 is a wasteful number, since it uses less digits than its factorization.

27212047640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52403 (or 52399 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The spelling of 27212047640 in words is "twenty-seven billion, two hundred twelve million, forty-seven thousand, six hundred forty".