12051902258 has 18 divisors (see below), whose sum is σ = 19873514493. Its totient is φ = 5477361120.

The previous prime is 12051902257. The next prime is 12051902267. The reversal of 12051902258 is 85220915021.

It can be written as a sum of positive squares in 2 ways, for example, as 6312779209 + 5739123049 = 79453^2 + 75757^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77627.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12051902257) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 1704266 + ... + 1711322.

Almost surely, 2^12051902258 is an apocalyptic number.

12051902258 is a deficient number, since it is larger than the sum of its proper divisors (7821612235).

12051902258 is an frugal number, since it uses more digits than its factorization.

12051902258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14138 (or 7070 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 12051902258 in words is "twelve billion, fifty-one million, nine hundred two thousand, two hundred fifty-eight".