1217408581444 has 24 divisors (see below), whose sum is σ = 2328801300000. Its totient is φ = 552258574080.

The previous prime is 1217408581393. The next prime is 1217408581451. The reversal of 1217408581444 is 4441858047121.

It is a super-2 number, since 2×1217408581444² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27701869 + ... + 27745780.

It is an arithmetic number, because the mean of its divisors is an integer number (97033387500).

Almost surely, 2^{1217408581444} is an apocalyptic number.

It is an amenable number.

1217408581444 is a deficient number, since it is larger than the sum of its proper divisors (1111392718556).

1217408581444 is a wasteful number, since it uses less digits than its factorization.

1217408581444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55448163 (or 55448161 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 49.

The spelling of 1217408581444 in words is "one trillion, two hundred seventeen billion, four hundred eight million, five hundred eighty-one thousand, four hundred forty-four".