123365131265 has 8 divisors (see below), whose sum is σ = 150066077928. Its totient is φ = 97340158080.

The previous prime is 123365131231. The next prime is 123365131271. The reversal of 123365131265 is 562131563321.

It can be written as a sum of positive squares in 4 ways, for example, as 7108681969 + 116256449296 = 84313^2 + 340964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123365131265 - 2⁸ = 123365131009 is a prime.

It is a super-2 number, since 2×123365131265² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168992966 + ... + 168993695.

It is an arithmetic number, because the mean of its divisors is an integer number (18758259741).

Almost surely, 2^123365131265 is an apocalyptic number.

It is an amenable number.

123365131265 is a deficient number, since it is larger than the sum of its proper divisors (26700946663).

123365131265 is an equidigital number, since it uses as much as digits as its factorization.

123365131265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337986739.

The product of its digits is 97200, while the sum is 38.

Adding to 123365131265 its reverse (562131563321), we get a palindrome (685496694586).

The spelling of 123365131265 in words is "one hundred twenty-three billion, three hundred sixty-five million, one hundred thirty-one thousand, two hundred sixty-five".