145190644 has 6 divisors (see below), whose sum is σ = 254083634. Its totient is φ = 72595320.

The previous prime is 145190621. The next prime is 145190653. The reversal of 145190644 is 446091541.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 144288144 + 902500 = 12012^2 + 950^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18148827 + ... + 18148834.

Almost surely, 2^145190644 is an apocalyptic number.

It is an amenable number.

145190644 is a deficient number, since it is larger than the sum of its proper divisors (108892990).

145190644 is a wasteful number, since it uses less digits than its factorization.

145190644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36297665 (or 36297663 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 145190644 is about 12049.5080397500. The cubic root of 145190644 is about 525.5889312444.

The spelling of 145190644 in words is "one hundred forty-five million, one hundred ninety thousand, six hundred forty-four".