2115604441565 has 16 divisors (see below), whose sum is σ = 2579254425792. Its totient is φ = 1665515875584.

The previous prime is 2115604441543. The next prime is 2115604441583. The reversal of 2115604441565 is 5651444065112.

It is a cyclic number.

It is not a de Polignac number, because 2115604441565 - 2⁶ = 2115604441501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2904659 + ... + 3559248.

It is an arithmetic number, because the mean of its divisors is an integer number (161203401612).

Almost surely, 2^{2115604441565} is an apocalyptic number.

It is an amenable number.

2115604441565 is a deficient number, since it is larger than the sum of its proper divisors (463649984227).

2115604441565 is an equidigital number, since it uses as much as digits as its factorization.

2115604441565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464956.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 2115604441565 in words is "two trillion, one hundred fifteen billion, six hundred four million, four hundred forty-one thousand, five hundred sixty-five".