15123113532 has 96 divisors (see below), whose sum is σ = 40545792000. Its totient is φ = 4869633600.

The previous prime is 15123113491. The next prime is 15123113569. The reversal of 15123113532 is 23531132151.

15123113532 is a `hidden beast` number, since 1 + 5 + 12 + 3 + 113 + 532 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 15123113496 and 15123113505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001682 + ... + 2009222.

It is an arithmetic number, because the mean of its divisors is an integer number (422352000).

Almost surely, 2^15123113532 is an apocalyptic number.

15123113532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15123113532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20272896000).

15123113532 is an abundant number, since it is smaller than the sum of its proper divisors (25422678468).

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

15123113532 is a wasteful number, since it uses less digits than its factorization.

15123113532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8184 (or 8176 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

Adding to 15123113532 its reverse (23531132151), we get a palindrome (38654245683).

The spelling of 15123113532 in words is "fifteen billion, one hundred twenty-three million, one hundred thirteen thousand, five hundred thirty-two".