12209999958 has 48 divisors (see below), whose sum is σ = 28527853536. Its totient is φ = 3751931520.

The previous prime is 12209999953. The next prime is 12209999959. The reversal of 12209999958 is 85999990221.

It is a junction number, because it is equal to n+sod(n) for n = 12209999895 and 12209999904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209999953) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143791 + ... + 212357.

It is an arithmetic number, because the mean of its divisors is an integer number (594330282).

Almost surely, 2^12209999958 is an apocalyptic number.

12209999958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12209999958 is an abundant number, since it is smaller than the sum of its proper divisors (16317853578).

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

12209999958 is a wasteful number, since it uses less digits than its factorization.

12209999958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69349 (or 69346 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 63.

The spelling of 12209999958 in words is "twelve billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred fifty-eight".