645053165613415 has 16 divisors (see below), whose sum is σ = 833648554021248. Its totient is φ = 476323303838976.

The previous prime is 645053165613397. The next prime is 645053165613419. The reversal of 645053165613415 is 514316561350546.

It is a cyclic number.

It is not a de Polignac number, because 645053165613415 - 2¹⁵ = 645053165580647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645053165613419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245026774 + ... + 247645363.

It is an arithmetic number, because the mean of its divisors is an integer number (52103034626328).

Almost surely, 2^{645053165613415} is an apocalyptic number.

645053165613415 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

645053165613415 is a deficient number, since it is larger than the sum of its proper divisors (188595388407833).

645053165613415 is a wasteful number, since it uses less digits than its factorization.

645053165613415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492692298.

The product of its (nonzero) digits is 19440000, while the sum is 55.

The spelling of 645053165613415 in words is "six hundred forty-five trillion, fifty-three billion, one hundred sixty-five million, six hundred thirteen thousand, four hundred fifteen".