27212215680 has 640 divisors, whose sum is σ = 105746256000. Its totient is φ = 6628884480.

The previous prime is 27212215661. The next prime is 27212215703. The reversal of 27212215680 is 8651221272.

It is a happy number.

27212215680 is a `hidden beast` number, since 2 + 72 + 1 + 2 + 21 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 100413945 + ... + 100414215.

It is an arithmetic number, because the mean of its divisors is an integer number (165228525).

Almost surely, 2^27212215680 is an apocalyptic number.

27212215680 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 27212215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52873128000).

27212215680 is an abundant number, since it is smaller than the sum of its proper divisors (78534040320).

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

27212215680 is a wasteful number, since it uses less digits than its factorization.

27212215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 27212215680 in words is "twenty-seven billion, two hundred twelve million, two hundred fifteen thousand, six hundred eighty".