1145644721232 has 120 divisors (see below), whose sum is σ = 3254576797920. Its totient is φ = 347006880000.

The previous prime is 1145644721227. The next prime is 1145644721233. The reversal of 1145644721232 is 2321274465411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145644721233) 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, 13029994 + ... + 13117622.

It is an arithmetic number, because the mean of its divisors is an integer number (27121473316).

Almost surely, 2^{1145644721232} is an apocalyptic number.

1145644721232 is a gapful number since it is divisible by the number (12) 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 1145644721232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627288398960).

1145644721232 is an abundant number, since it is smaller than the sum of its proper divisors (2108932076688).

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

1145644721232 is a wasteful number, since it uses less digits than its factorization.

1145644721232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89913 (or 89896 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The spelling of 1145644721232 in words is "one trillion, one hundred forty-five billion, six hundred forty-four million, seven hundred twenty-one thousand, two hundred thirty-two".