12219977958 has 16 divisors (see below), whose sum is σ = 24464982960. Its totient is φ = 4069154816.

The previous prime is 12219977923. The next prime is 12219978013. The reversal of 12219977958 is 85977991221.

It is a happy number.

It is a super-2 number, since 2×12219977958² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 1036443 + ... + 1048166.

It is an arithmetic number, because the mean of its divisors is an integer number (1529061435).

Almost surely, 2^12219977958 is an apocalyptic number.

12219977958 is an abundant number, since it is smaller than the sum of its proper divisors (12245005002).

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

12219977958 is a wasteful number, since it uses less digits than its factorization.

12219977958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085591.

The product of its digits is 5715360, while the sum is 60.

The spelling of 12219977958 in words is "twelve billion, two hundred nineteen million, nine hundred seventy-seven thousand, nine hundred fifty-eight".