12158472081 has 16 divisors (see below), whose sum is σ = 18718200704. Its totient is φ = 6876071424.

The previous prime is 12158472071. The next prime is 12158472091. The reversal of 12158472081 is 18027485121.

It is an interprime number because it is at equal distance from previous prime (12158472071) and next prime (12158472091).

It is not a de Polignac number, because 12158472081 - 2⁶ = 12158472017 is a prime.

It is a super-2 number, since 2×12158472081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12158472031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2982370 + ... + 2986443.

It is an arithmetic number, because the mean of its divisors is an integer number (1169887544).

Almost surely, 2^12158472081 is an apocalyptic number.

It is an amenable number.

12158472081 is a deficient number, since it is larger than the sum of its proper divisors (6559728623).

12158472081 is an equidigital number, since it uses as much as digits as its factorization.

12158472081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968920.

The product of its (nonzero) digits is 35840, while the sum is 39.

The spelling of 12158472081 in words is "twelve billion, one hundred fifty-eight million, four hundred seventy-two thousand, eighty-one".