145520666064 has 90 divisors (see below), whose sum is σ = 409413924738. Its totient is φ = 48251184000.

The previous prime is 145520666047. The next prime is 145520666069. The reversal of 145520666064 is 460666025541.

It can be written as a sum of positive squares in only one way, i.e., 119779672464 + 25740993600 = 346092^2 + 160440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145520666069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5239414 + ... + 5267114.

Almost surely, 2^145520666064 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 145520666064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204706962369).

145520666064 is an abundant number, since it is smaller than the sum of its proper divisors (263893258674).

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

145520666064 is a wasteful number, since it uses less digits than its factorization.

145520666064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28097 (or 27897 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 145520666064 in words is "one hundred forty-five billion, five hundred twenty million, six hundred sixty-six thousand, sixty-four".