12422977938 has 162 divisors, whose sum is σ = 32749184871. Its totient is φ = 3523886856.

The previous prime is 12422977891. The next prime is 12422977951. The reversal of 12422977938 is 83977922421.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6211488969 + 6211488969 = 78813^2 + 78813^2 .

It is a tau number, because it is divible by the number of its divisors (162).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78813.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 89373873 + ... + 89374011.

Almost surely, 2^12422977938 is an apocalyptic number.

12422977938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12422977938

12422977938 is an abundant number, since it is smaller than the sum of its proper divisors (20326206933).

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

12422977938 is an frugal number, since it uses more digits than its factorization.

12422977938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 151 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 12422977938 in words is "twelve billion, four hundred twenty-two million, nine hundred seventy-seven thousand, nine hundred thirty-eight".