123461231505 has 16 divisors (see below), whose sum is σ = 204349625280. Its totient is φ = 63575438528.

The previous prime is 123461231503. The next prime is 123461231549. The reversal of 123461231505 is 505132164321.

It is a cyclic number.

It is not a de Polignac number, because 123461231505 - 2¹ = 123461231503 is a prime.

It is a super-3 number, since 3×123461231505³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (123461231503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141909027 + ... + 141909896.

It is an arithmetic number, because the mean of its divisors is an integer number (12771851580).

Almost surely, 2^123461231505 is an apocalyptic number.

123461231505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123461231505 is a deficient number, since it is larger than the sum of its proper divisors (80888393775).

123461231505 is a wasteful number, since it uses less digits than its factorization.

123461231505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283818960.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 123461231505 its reverse (505132164321), we get a palindrome (628593395826).

The spelling of 123461231505 in words is "one hundred twenty-three billion, four hundred sixty-one million, two hundred thirty-one thousand, five hundred five".