11997456442 has 8 divisors (see below), whose sum is σ = 17996855796. Its totient is φ = 5998504512.

The previous prime is 11997456431. The next prime is 11997456473. The reversal of 11997456442 is 24465479911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10281757201 + 1715699241 = 101399^2 + 41421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11997456442² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11997456442.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33973 + ... + 158584.

Almost surely, 2^11997456442 is an apocalyptic number.

11997456442 is a deficient number, since it is larger than the sum of its proper divisors (5999399354).

11997456442 is a wasteful number, since it uses less digits than its factorization.

11997456442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223712.

The product of its digits is 2177280, while the sum is 52.

The spelling of 11997456442 in words is "eleven billion, nine hundred ninety-seven million, four hundred fifty-six thousand, four hundred forty-two".