15501120136 has 64 divisors (see below), whose sum is σ = 30472041600. Its totient is φ = 7383011328.

The previous prime is 15501120109. The next prime is 15501120161. The reversal of 15501120136 is 63102110551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15501120136.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7335016 + ... + 7337128.

It is an arithmetic number, because the mean of its divisors is an integer number (476125650).

Almost surely, 2^15501120136 is an apocalyptic number.

It is an amenable number.

15501120136 is a deficient number, since it is larger than the sum of its proper divisors (14970921464).

15501120136 is a wasteful number, since it uses less digits than its factorization.

15501120136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 15501120136 its reverse (63102110551), we get a palindrome (78603230687).

The spelling of 15501120136 in words is "fifteen billion, five hundred one million, one hundred twenty thousand, one hundred thirty-six".