123455050565 has 32 divisors (see below), whose sum is σ = 187458361344. Its totient is φ = 75810335040.

The previous prime is 123455050487. The next prime is 123455050571. The reversal of 123455050565 is 565050554321.

It is not a de Polignac number, because 123455050565 - 2¹⁰ = 123455049541 is a prime.

It is a super-2 number, since 2×123455050565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2367209 + ... + 2418798.

It is an arithmetic number, because the mean of its divisors is an integer number (5858073792).

Almost surely, 2^123455050565 is an apocalyptic number.

It is an amenable number.

123455050565 is a deficient number, since it is larger than the sum of its proper divisors (64003310779).

123455050565 is a wasteful number, since it uses less digits than its factorization.

123455050565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786097.

The product of its (nonzero) digits is 450000, while the sum is 41.

The spelling of 123455050565 in words is "one hundred twenty-three billion, four hundred fifty-five million, fifty thousand, five hundred sixty-five".