145145021593 has 32 divisors (see below), whose sum is σ = 172059656832. Its totient is φ = 121707685440.

The previous prime is 145145021537. The next prime is 145145021621. The reversal of 145145021593 is 395120541541.

It is not a de Polignac number, because 145145021593 - 2¹³ = 145145013401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145145021513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32302455 + ... + 32306947.

It is an arithmetic number, because the mean of its divisors is an integer number (5376864276).

Almost surely, 2^145145021593 is an apocalyptic number.

145145021593 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145145021593 is a deficient number, since it is larger than the sum of its proper divisors (26914635239).

145145021593 is a wasteful number, since it uses less digits than its factorization.

145145021593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6406 (or 6384 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 145145021593 in words is "one hundred forty-five billion, one hundred forty-five million, twenty-one thousand, five hundred ninety-three".