145561720513 has 16 divisors (see below), whose sum is σ = 162611203392. Its totient is φ = 129153024000.

The previous prime is 145561720489. The next prime is 145561720519. The reversal of 145561720513 is 315027165541.

It is a happy number.

It is not a de Polignac number, because 145561720513 - 2⁵ = 145561720481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145561720519) 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 15 ways as a sum of consecutive naturals, for example, 508353 + ... + 741313.

It is an arithmetic number, because the mean of its divisors is an integer number (10163200212).

Almost surely, 2^145561720513 is an apocalyptic number.

It is an amenable number.

145561720513 is a deficient number, since it is larger than the sum of its proper divisors (17049482879).

145561720513 is a wasteful number, since it uses less digits than its factorization.

145561720513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234336.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 145561720513 in words is "one hundred forty-five billion, five hundred sixty-one million, seven hundred twenty thousand, five hundred thirteen".