15122320512 has 128 divisors (see below), whose sum is σ = 44750664000. Its totient is φ = 4492529664.

The previous prime is 15122320501. The next prime is 15122320517. The reversal of 15122320512 is 21502322151.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (15122320517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92539 + ... + 196997.

Almost surely, 2^15122320512 is an apocalyptic number.

15122320512 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 15122320512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22375332000).

15122320512 is an abundant number, since it is smaller than the sum of its proper divisors (29628343488).

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

15122320512 is a wasteful number, since it uses less digits than its factorization.

15122320512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104518 (or 104506 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 15122320512 its reverse (21502322151), we get a palindrome (36624642663).

The spelling of 15122320512 in words is "fifteen billion, one hundred twenty-two million, three hundred twenty thousand, five hundred twelve".