15405423424513 has 12 divisors (see below), whose sum is σ = 16282936957140. Its totient is φ = 14557729485152.

The previous prime is 15405423424507. The next prime is 15405423424519. The reversal of 15405423424513 is 31542432450451.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (15405423424507) and next prime (15405423424519).

It can be written as a sum of positive squares in 2 ways, for example, as 7378894153744 + 8026529270769 = 2716412^2 + 2833113^2 .

It is not a de Polignac number, because 15405423424513 - 2¹³ = 15405423416321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15405423424513.

It is not an unprimeable number, because it can be changed into a prime (15405423424519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120176206 + ... + 120304327.

It is an arithmetic number, because the mean of its divisors is an integer number (1356911413095).

Almost surely, 2^{15405423424513} is an apocalyptic number.

It is an amenable number.

15405423424513 is a deficient number, since it is larger than the sum of its proper divisors (877513532627).

15405423424513 is an equidigital number, since it uses as much as digits as its factorization.

15405423424513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240480656 (or 240480609 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 15405423424513 its reverse (31542432450451), we get a palindrome (46947855874964).

The spelling of 15405423424513 in words is "fifteen trillion, four hundred five billion, four hundred twenty-three million, four hundred twenty-four thousand, five hundred thirteen".