1111163641565 has 4 divisors (see below), whose sum is σ = 1333396369884. Its totient is φ = 888930913248.

The previous prime is 1111163641501. The next prime is 1111163641591. The reversal of 1111163641565 is 5651463611111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 709134094201 + 402029547364 = 842101^2 + 634058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111163641565 - 2⁶ = 1111163641501 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 3 ways as a sum of consecutive naturals, for example, 111116364152 + ... + 111116364161.

It is an arithmetic number, because the mean of its divisors is an integer number (333349092471).

Almost surely, 2^{1111163641565} is an apocalyptic number.

It is an amenable number.

1111163641565 is a deficient number, since it is larger than the sum of its proper divisors (222232728319).

1111163641565 is an equidigital number, since it uses as much as digits as its factorization.

1111163641565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222232728318.

The product of its digits is 64800, while the sum is 41.

The spelling of 1111163641565 in words is "one trillion, one hundred eleven billion, one hundred sixty-three million, six hundred forty-one thousand, five hundred sixty-five".