1644553133160 has 96 divisors (see below), whose sum is σ = 5739154832160. Its totient is φ = 375897857664.

The previous prime is 1644553133087. The next prime is 1644553133161. The reversal of 1644553133160 is 613313554461.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1644553133161) 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, 139837074 + ... + 139848833.

It is an arithmetic number, because the mean of its divisors is an integer number (59782862835).

Almost surely, 2^{1644553133160} is an apocalyptic number.

1644553133160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1644553133160 is an abundant number, since it is smaller than the sum of its proper divisors (4094601699000).

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

1644553133160 is a wasteful number, since it uses less digits than its factorization.

1644553133160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279685935 (or 279685924 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 1644553133160 in words is "one trillion, six hundred forty-four billion, five hundred fifty-three million, one hundred thirty-three thousand, one hundred sixty".