145142173507 has 4 divisors (see below), whose sum is σ = 149824179136. Its totient is φ = 140460167880.

The previous prime is 145142173483. The next prime is 145142173567. The reversal of 145142173507 is 705371241541.

145142173507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 705371241541 = 17 ⋅41492425973.

It is a cyclic number.

It is not a de Polignac number, because 145142173507 - 2¹¹ = 145142171459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145142173507.

It is not an unprimeable number, because it can be changed into a prime (145142173567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2341002768 + ... + 2341002829.

It is an arithmetic number, because the mean of its divisors is an integer number (37456044784).

Almost surely, 2^145142173507 is an apocalyptic number.

145142173507 is a deficient number, since it is larger than the sum of its proper divisors (4682005629).

145142173507 is an equidigital number, since it uses as much as digits as its factorization.

145142173507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682005628.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 145142173507 in words is "one hundred forty-five billion, one hundred forty-two million, one hundred seventy-three thousand, five hundred seven".