2643109265465 has 8 divisors (see below), whose sum is σ = 3171923711880. Its totient is φ = 2114359016832.

The previous prime is 2643109265453. The next prime is 2643109265501. The reversal of 2643109265465 is 5645629013462.

2643109265465 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 269056951849 + 2374052313616 = 518707^2 + 1540796^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2643109265465 - 2¹² = 2643109261369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15958820 + ... + 16123589.

It is an arithmetic number, because the mean of its divisors is an integer number (396490463985).

Almost surely, 2^{2643109265465} is an apocalyptic number.

It is an amenable number.

2643109265465 is a deficient number, since it is larger than the sum of its proper divisors (528814446415).

2643109265465 is a wasteful number, since it uses less digits than its factorization.

2643109265465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32098891.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 2643109265465 in words is "two trillion, six hundred forty-three billion, one hundred nine million, two hundred sixty-five thousand, four hundred sixty-five".