645113542337515 has 8 divisors (see below), whose sum is σ = 774138501547488. Its totient is φ = 516089333375040.

The previous prime is 645113542337513. The next prime is 645113542337519. The reversal of 645113542337515 is 515733245311546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645113542337515 - 2¹ = 645113542337513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645113542337513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185668426 + ... + 189111055.

It is an arithmetic number, because the mean of its divisors is an integer number (96767312693436).

Almost surely, 2^{645113542337515} is an apocalyptic number.

645113542337515 is a deficient number, since it is larger than the sum of its proper divisors (129024959209973).

645113542337515 is a wasteful number, since it uses less digits than its factorization.

645113542337515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375123749.

The product of its digits is 22680000, while the sum is 55.

The spelling of 645113542337515 in words is "six hundred forty-five trillion, one hundred thirteen billion, five hundred forty-two million, three hundred thirty-seven thousand, five hundred fifteen".