15978331225115 has 8 divisors (see below), whose sum is σ = 21913139965920. Its totient is φ = 10956569982912.

The previous prime is 15978331225081. The next prime is 15978331225147. The reversal of 15978331225115 is 51152213387951.

15978331225115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15978331225115 - 2²⁶ = 15978264116251 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228261874610 + ... + 228261874679.

It is an arithmetic number, because the mean of its divisors is an integer number (2739142495740).

Almost surely, 2^{15978331225115} is an apocalyptic number.

15978331225115 is a deficient number, since it is larger than the sum of its proper divisors (5934808740805).

15978331225115 is an equidigital number, since it uses as much as digits as its factorization.

15978331225115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456523749301.

The product of its digits is 2268000, while the sum is 53.

The spelling of 15978331225115 in words is "fifteen trillion, nine hundred seventy-eight billion, three hundred thirty-one million, two hundred twenty-five thousand, one hundred fifteen".