15423054505 has 4 divisors (see below), whose sum is σ = 18507665412. Its totient is φ = 12338443600.

The previous prime is 15423054503. The next prime is 15423054527. The reversal of 15423054505 is 50545032451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50545032451 = 17 ⋅2973237203.

It can be written as a sum of positive squares in 2 ways, for example, as 3458851344 + 11964203161 = 58812^2 + 109381^2 .

It is not a de Polignac number, because 15423054505 - 2¹ = 15423054503 is a prime.

It is a super-2 number, since 2×15423054505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15423054503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1542305446 + ... + 1542305455.

It is an arithmetic number, because the mean of its divisors is an integer number (4626916353).

Almost surely, 2^15423054505 is an apocalyptic number.

It is an amenable number.

15423054505 is a deficient number, since it is larger than the sum of its proper divisors (3084610907).

15423054505 is an equidigital number, since it uses as much as digits as its factorization.

15423054505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084610906.

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 15423054505 its reverse (50545032451), we get a palindrome (65968086956).

The spelling of 15423054505 in words is "fifteen billion, four hundred twenty-three million, fifty-four thousand, five hundred five".