15970128158 has 4 divisors (see below), whose sum is σ = 23955192240. Its totient is φ = 7985064078.

The previous prime is 15970128157. The next prime is 15970128199. The reversal of 15970128158 is 85182107951.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15970128157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992532038 + ... + 3992532041.

It is an arithmetic number, because the mean of its divisors is an integer number (5988798060).

Almost surely, 2^15970128158 is an apocalyptic number.

15970128158 is a deficient number, since it is larger than the sum of its proper divisors (7985064082).

15970128158 is an equidigital number, since it uses as much as digits as its factorization.

15970128158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985064081.

The product of its (nonzero) digits is 201600, while the sum is 47.

The spelling of 15970128158 in words is "fifteen billion, nine hundred seventy million, one hundred twenty-eight thousand, one hundred fifty-eight".