11973948642 has 24 divisors (see below), whose sum is σ = 25948529100. Its totient is φ = 3990551040.

The previous prime is 11973948631. The next prime is 11973948643. The reversal of 11973948642 is 24684937911.

11973948642 is a `hidden beast` number, since 1 + 1 + 97 + 39 + 486 + 42 = 666.

11973948642 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9443758041 + 2530190601 = 97179^2 + 50301^2 .

It is not an unprimeable number, because it can be changed into a prime (11973948643) 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 11 ways as a sum of consecutive naturals, for example, 37042 + ... + 159122.

Almost surely, 2^11973948642 is an apocalyptic number.

11973948642 is an abundant number, since it is smaller than the sum of its proper divisors (13974580458).

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

11973948642 is a wasteful number, since it uses less digits than its factorization.

11973948642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127538 (or 127535 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 11973948642 in words is "eleven billion, nine hundred seventy-three million, nine hundred forty-eight thousand, six hundred forty-two".