15501422120 has 64 divisors (see below), whose sum is σ = 36945493200. Its totient is φ = 5833359360.

The previous prime is 15501422059. The next prime is 15501422159. The reversal of 15501422120 is 2122410551.

It can be written as a sum of positive squares in 8 ways, for example, as 7600701124 + 7900720996 = 87182^2 + 88886^2 .

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, 2804960 + ... + 2810480.

Almost surely, 2^15501422120 is an apocalyptic number.

15501422120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15501422120 is an abundant number, since it is smaller than the sum of its proper divisors (21444071080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15501422120 is a wasteful number, since it uses less digits than its factorization.

15501422120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9678 (or 9674 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 15501422120 its reverse (2122410551), we get a palindrome (17623832671).

The spelling of 15501422120 in words is "fifteen billion, five hundred one million, four hundred twenty-two thousand, one hundred twenty".