23155481773 has 4 divisors (see below), whose sum is σ = 24374191360. Its totient is φ = 21936772188.

The previous prime is 23155481753. The next prime is 23155481777. The reversal of 23155481773 is 37718455132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23155481773 is a prime.

It is a super-2 number, since 2×23155481773² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155481777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609354765 + ... + 609354802.

It is an arithmetic number, because the mean of its divisors is an integer number (6093547840).

Almost surely, 2^23155481773 is an apocalyptic number.

It is an amenable number.

23155481773 is a deficient number, since it is larger than the sum of its proper divisors (1218709587).

23155481773 is a wasteful number, since it uses less digits than its factorization.

23155481773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218709586.

The product of its digits is 705600, while the sum is 46.

The spelling of 23155481773 in words is "twenty-three billion, one hundred fifty-five million, four hundred eighty-one thousand, seven hundred seventy-three".