145244020256515 has 4 divisors (see below), whose sum is σ = 174292824307824. Its totient is φ = 116195216205208.

The previous prime is 145244020256513. The next prime is 145244020256551. The reversal of 145244020256515 is 515652020442541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145244020256515 - 2¹ = 145244020256513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145244020256513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14524402025647 + ... + 14524402025656.

It is an arithmetic number, because the mean of its divisors is an integer number (43573206076956).

Almost surely, 2^{145244020256515} is an apocalyptic number.

145244020256515 is a deficient number, since it is larger than the sum of its proper divisors (29048804051309).

145244020256515 is an equidigital number, since it uses as much as digits as its factorization.

145244020256515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29048804051308.

The product of its (nonzero) digits is 1920000, while the sum is 46.

The spelling of 145244020256515 in words is "one hundred forty-five trillion, two hundred forty-four billion, twenty million, two hundred fifty-six thousand, five hundred fifteen".