1298117664 has 144 divisors (see below), whose sum is σ = 3858996960. Its totient is φ = 429235200.

The previous prime is 1298117663. The next prime is 1298117693. The reversal of 1298117664 is 4667118921.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (1298117663) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1080264 + ... + 1081464.

It is an arithmetic number, because the mean of its divisors is an integer number (26798590).

Almost surely, 2^1298117664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298117664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929498480).

1298117664 is an abundant number, since it is smaller than the sum of its proper divisors (2560879296).

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

1298117664 is a wasteful number, since it uses less digits than its factorization.

1298117664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1365 (or 1345 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1298117664 is about 36029.3999950041. The cubic root of 1298117664 is about 1090.8658675602.

The spelling of 1298117664 in words is "one billion, two hundred ninety-eight million, one hundred seventeen thousand, six hundred sixty-four".