145605346221 has 16 divisors (see below), whose sum is σ = 202706634240. Its totient is φ = 92792364720.

The previous prime is 145605346213. The next prime is 145605346247. The reversal of 145605346221 is 122643506541.

It is not a de Polignac number, because 145605346221 - 2³ = 145605346213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145605346221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145605346291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 539995 + ... + 763416.

It is an arithmetic number, because the mean of its divisors is an integer number (12669164640).

Almost surely, 2^145605346221 is an apocalyptic number.

It is an amenable number.

145605346221 is a deficient number, since it is larger than the sum of its proper divisors (57101288019).

145605346221 is a wasteful number, since it uses less digits than its factorization.

145605346221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305056.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 145605346221 in words is "one hundred forty-five billion, six hundred five million, three hundred forty-six thousand, two hundred twenty-one".