11898617472 has 576 divisors, whose sum is σ = 42622201440. Its totient is φ = 3292047360.

The previous prime is 11898617449. The next prime is 11898617473. The reversal of 11898617472 is 27471689811.

11898617472 is a `hidden beast` number, since 1 + 1 + 89 + 86 + 17 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (11898617473) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 56391447 + ... + 56391657.

Almost surely, 2^11898617472 is an apocalyptic number.

11898617472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11898617472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21311100720).

11898617472 is an abundant number, since it is smaller than the sum of its proper divisors (30723583968).

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

11898617472 is an equidigital number, since it uses as much as digits as its factorization.

11898617472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 260 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The spelling of 11898617472 in words is "eleven billion, eight hundred ninety-eight million, six hundred seventeen thousand, four hundred seventy-two".