27220976640 has 1408 divisors, whose sum is σ = 121821719040. Its totient is φ = 5733089280.

The previous prime is 27220976621. The next prime is 27220976737. The reversal of 27220976640 is 4667902272.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1601233912 + ... + 1601233928.

Almost surely, 2^27220976640 is an apocalyptic number.

27220976640 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 27220976640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60910859520).

27220976640 is an abundant number, since it is smaller than the sum of its proper divisors (94600742400).

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

27220976640 is a wasteful number, since it uses less digits than its factorization.

27220976640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 27220976640 in words is "twenty-seven billion, two hundred twenty million, nine hundred seventy-six thousand, six hundred forty".