15520124042 has 8 divisors (see below), whose sum is σ = 23316506532. Its totient is φ = 7747955200.

The previous prime is 15520124029. The next prime is 15520124057. The reversal of 15520124042 is 24042102551.

It can be written as a sum of positive squares in 2 ways, for example, as 11431672561 + 4088451481 = 106919^2 + 63941^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6051809 + ... + 6054372.

Almost surely, 2^15520124042 is an apocalyptic number.

15520124042 is a deficient number, since it is larger than the sum of its proper divisors (7796382490).

15520124042 is a wasteful number, since it uses less digits than its factorization.

15520124042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12106824.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 15520124042 its reverse (24042102551), we get a palindrome (39562226593).

The spelling of 15520124042 in words is "fifteen billion, five hundred twenty million, one hundred twenty-four thousand, forty-two".