15123121244652 has 24 divisors (see below), whose sum is σ = 35470118572336. Its totient is φ = 5014921033728.

The previous prime is 15123121244639. The next prime is 15123121244689. The reversal of 15123121244652 is 25644212132151.

It is a super-2 number, since 2×15123121244652² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15123121244652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264920233 + ... + 3264924864.

Almost surely, 2^{15123121244652} is an apocalyptic number.

15123121244652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15123121244652 is an abundant number, since it is smaller than the sum of its proper divisors (20346997327684).

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

15123121244652 is a wasteful number, since it uses less digits than its factorization.

15123121244652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529845297 (or 6529845295 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The spelling of 15123121244652 in words is "fifteen trillion, one hundred twenty-three billion, one hundred twenty-one million, two hundred forty-four thousand, six hundred fifty-two".