145132401609 has 24 divisors (see below), whose sum is σ = 225984562440. Its totient is φ = 89224008192.

The previous prime is 145132401587. The next prime is 145132401611. The reversal of 145132401609 is 906104231541.

It is a happy number.

145132401609 is a `hidden beast` number, since 1 + 4 + 5 + 1 + 3 + 2 + 40 + 1 + 609 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 26570630025 + 118561771584 = 163005^2 + 344328^2 .

It is not a de Polignac number, because 145132401609 - 2⁵ = 145132401577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145132401619) 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 23 ways as a sum of consecutive naturals, for example, 493744 + ... + 730785.

It is an arithmetic number, because the mean of its divisors is an integer number (9416023435).

Almost surely, 2^145132401609 is an apocalyptic number.

It is an amenable number.

145132401609 is a deficient number, since it is larger than the sum of its proper divisors (80852160831).

145132401609 is a wasteful number, since it uses less digits than its factorization.

145132401609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225561 (or 1225558 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 145132401609 in words is "one hundred forty-five billion, one hundred thirty-two million, four hundred one thousand, six hundred nine".