9646540268545 has 64 divisors (see below), whose sum is σ = 12184196904000. Its totient is φ = 7322080116736.

The previous prime is 9646540268537. The next prime is 9646540268551. The reversal of 9646540268545 is 5458620456469.

It is a Cunningham number, because it is equal to 3105888²+1.

It can be written as a sum of positive squares in 32 ways, for example, as 7422099268609 + 2224440999936 = 2724353^2 + 1491456^2 .

It is a cyclic number.

It is not a de Polignac number, because 9646540268545 - 2³ = 9646540268537 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3582078219 + ... + 3582080911.

It is an arithmetic number, because the mean of its divisors is an integer number (190378076625).

Almost surely, 2^{9646540268545} is an apocalyptic number.

It is an amenable number.

9646540268545 is a deficient number, since it is larger than the sum of its proper divisors (2537656635455).

9646540268545 is a wasteful number, since it uses less digits than its factorization.

9646540268545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4422.

The product of its (nonzero) digits is 248832000, while the sum is 64.

The spelling of 9646540268545 in words is "nine trillion, six hundred forty-six billion, five hundred forty million, two hundred sixty-eight thousand, five hundred forty-five".