1241565566623 has 4 divisors (see below), whose sum is σ = 1241569447848. Its totient is φ = 1241561685400.

The previous prime is 1241565566621. The next prime is 1241565566629. The reversal of 1241565566623 is 3266655651421.

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

It is a cyclic number.

It is not a de Polignac number, because 1241565566623 - 2¹ = 1241565566621 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 (1241565566621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1412953 + ... + 2116498.

It is an arithmetic number, because the mean of its divisors is an integer number (310392361962).

Almost surely, 2^{1241565566623} is an apocalyptic number.

1241565566623 is a deficient number, since it is larger than the sum of its proper divisors (3881225).

1241565566623 is an equidigital number, since it uses as much as digits as its factorization.

1241565566623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881224.

The product of its digits is 7776000, while the sum is 52.

The spelling of 1241565566623 in words is "one trillion, two hundred forty-one billion, five hundred sixty-five million, five hundred sixty-six thousand, six hundred twenty-three".