1317669949440 has 1664 divisors, whose sum is σ = 5344065269760. Its totient is φ = 309586821120.

The previous prime is 1317669949439. The next prime is 1317669949481. The reversal of 1317669949440 is 449499667131.

1317669949440 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 66 + 99 + 49 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (1664).

It is a congruent number.

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, 18050273244 + ... + 18050273316.

Almost surely, 2^{1317669949440} is an apocalyptic number.

1317669949440 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 1317669949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2672032634880).

1317669949440 is an abundant number, since it is smaller than the sum of its proper divisors (4026395320320).

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

1317669949440 is an frugal number, since it uses more digits than its factorization.

1317669949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 1317669949440 in words is "one trillion, three hundred seventeen billion, six hundred sixty-nine million, nine hundred forty-nine thousand, four hundred forty".