505746720023 has 4 divisors (see below), whose sum is σ = 506776754568. Its totient is φ = 504716685480.

The previous prime is 505746719983. The next prime is 505746720029. The reversal of 505746720023 is 320027647505.

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 505746720023 - 2¹⁰ = 505746718999 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 (505746720029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515016536 + ... + 515017517.

It is an arithmetic number, because the mean of its divisors is an integer number (126694188642).

Almost surely, 2^505746720023 is an apocalyptic number.

505746720023 is a deficient number, since it is larger than the sum of its proper divisors (1030034545).

505746720023 is a wasteful number, since it uses less digits than its factorization.

505746720023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030034544.

The product of its (nonzero) digits is 352800, while the sum is 41.

The spelling of 505746720023 in words is "five hundred five billion, seven hundred forty-six million, seven hundred twenty thousand, twenty-three".