1227255644160 has 1632 divisors, whose sum is σ = 5564876204160. Its totient is φ = 242799869952.

The previous prime is 1227255644149. The next prime is 1227255644201. The reversal of 1227255644160 is 614465527221.

1227255644160 is a `hidden beast` number, since 1 + 2 + 2 + 7 + 25 + 564 + 4 + 1 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1632).

It is a super-2 number, since 2×1227255644160² (a number of 25 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 4562288506 + ... + 4562288774.

Almost surely, 2^{1227255644160} is an apocalyptic number.

1227255644160 is a gapful number since it is divisible by the number (10) 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 1227255644160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782438102080).

1227255644160 is an abundant number, since it is smaller than the sum of its proper divisors (4337620560000).

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

1227255644160 is a wasteful number, since it uses less digits than its factorization.

1227255644160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 1227255644160 in words is "one trillion, two hundred twenty-seven billion, two hundred fifty-five million, six hundred forty-four thousand, one hundred sixty".