12158478528 has 56 divisors (see below), whose sum is σ = 36764927232. Its totient is φ = 3473850624.

The previous prime is 12158478517. The next prime is 12158478539. The reversal of 12158478528 is 82587485121.

It is an interprime number because it is at equal distance from previous prime (12158478517) and next prime (12158478539).

It is a tau number, because it is divible by the number of its divisors (56).

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, 4521900 + ... + 4524587.

Almost surely, 2^12158478528 is an apocalyptic number.

It is an amenable number.

12158478528 is an abundant number, since it is smaller than the sum of its proper divisors (24606448704).

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

12158478528 is an equidigital number, since it uses as much as digits as its factorization.

12158478528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9046509 (or 9046499 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 51.

The spelling of 12158478528 in words is "twelve billion, one hundred fifty-eight million, four hundred seventy-eight thousand, five hundred twenty-eight".