11979453948 has 72 divisors (see below), whose sum is σ = 35471649024. Its totient is φ = 3111544800.

The previous prime is 11979453947. The next prime is 11979453961. The reversal of 11979453948 is 84935497911.

It is a junction number, because it is equal to n+sod(n) for n = 11979453891 and 11979453900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979453947) 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, 919588 + ... + 932523.

It is an arithmetic number, because the mean of its divisors is an integer number (492661792).

Almost surely, 2^11979453948 is an apocalyptic number.

It is an amenable number.

11979453948 is an abundant number, since it is smaller than the sum of its proper divisors (23492195076).

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

11979453948 is a wasteful number, since it uses less digits than its factorization.

11979453948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852143 (or 1852134 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 60.

The spelling of 11979453948 in words is "eleven billion, nine hundred seventy-nine million, four hundred fifty-three thousand, nine hundred forty-eight".