11953487872 has 60 divisors (see below), whose sum is σ = 24946434576. Its totient is φ = 5716705280.

The previous prime is 11953487839. The next prime is 11953487881. The reversal of 11953487872 is 27878435911.

It is a congruent number.

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, 360972 + ... + 392692.

Almost surely, 2^11953487872 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 11953487872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12473217288).

11953487872 is an abundant number, since it is smaller than the sum of its proper divisors (12992946704).

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

11953487872 is an frugal number, since it uses more digits than its factorization.

11953487872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31772 (or 31746 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 55.

The spelling of 11953487872 in words is "eleven billion, nine hundred fifty-three million, four hundred eighty-seven thousand, eight hundred seventy-two".