15121678798028 has 24 divisors (see below), whose sum is σ = 29864130544080. Its totient is φ = 6636473453120.

The previous prime is 15121678798019. The next prime is 15121678798067. The reversal of 15121678798028 is 82089787612151.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5925421451 + ... + 5925424002.

It is an arithmetic number, because the mean of its divisors is an integer number (1244338772670).

Almost surely, 2^{15121678798028} is an apocalyptic number.

It is an amenable number.

15121678798028 is a deficient number, since it is larger than the sum of its proper divisors (14742451746052).

15121678798028 is a wasteful number, since it uses less digits than its factorization.

15121678798028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11850845497 (or 11850845495 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 65.

The spelling of 15121678798028 in words is "fifteen trillion, one hundred twenty-one billion, six hundred seventy-eight million, seven hundred ninety-eight thousand, twenty-eight".