15040450042 has 16 divisors (see below), whose sum is σ = 22871138472. Its totient is φ = 7417267200.

The previous prime is 15040449943. The next prime is 15040450057. The reversal of 15040450042 is 24005404051.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14752774521 + 287675521 = 121461^2 + 16961^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15040449989 and 15040450016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75459 + ... + 189142.

Almost surely, 2^15040450042 is an apocalyptic number.

15040450042 is a deficient number, since it is larger than the sum of its proper divisors (7830688430).

15040450042 is a wasteful number, since it uses less digits than its factorization.

15040450042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264993.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 15040450042 its reverse (24005404051), we get a palindrome (39045854093).

The spelling of 15040450042 in words is "fifteen billion, forty million, four hundred fifty thousand, forty-two".