145221224642 has 32 divisors (see below), whose sum is σ = 236012625408. Its totient is φ = 66619138176.

The previous prime is 145221224633. The next prime is 145221224663. The reversal of 145221224642 is 246422122541.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3708638 + ... + 3747590.

It is an arithmetic number, because the mean of its divisors is an integer number (7375394544).

Almost surely, 2^145221224642 is an apocalyptic number.

145221224642 is a deficient number, since it is larger than the sum of its proper divisors (90791400766).

145221224642 is a wasteful number, since it uses less digits than its factorization.

145221224642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39834.

The product of its digits is 61440, while the sum is 35.

The spelling of 145221224642 in words is "one hundred forty-five billion, two hundred twenty-one million, two hundred twenty-four thousand, six hundred forty-two".