11975421952 has 104 divisors (see below), whose sum is σ = 25925497920. Its totient is φ = 5498142720.

The previous prime is 11975421949. The next prime is 11975421959. The reversal of 11975421952 is 25912457911.

It is a tau number, because it is divible by the number of its divisors (104).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11975421959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12725802 + ... + 12726742.

Almost surely, 2^11975421952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11975421952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12962748960).

11975421952 is an abundant number, since it is smaller than the sum of its proper divisors (13950075968).

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

11975421952 is an equidigital number, since it uses as much as digits as its factorization.

11975421952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1195 counting only the distinct ones).

The product of its digits is 226800, while the sum is 46.

The spelling of 11975421952 in words is "eleven billion, nine hundred seventy-five million, four hundred twenty-one thousand, nine hundred fifty-two".