11895781312 has 56 divisors (see below), whose sum is σ = 24141696192. Its totient is φ = 5813683200.

The previous prime is 11895781277. The next prime is 11895781327. The reversal of 11895781312 is 21318759811.

It is a super-2 number, since 2×11895781312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912762 + ... + 925702.

Almost surely, 2^11895781312 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 11895781312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12070848096).

11895781312 is an abundant number, since it is smaller than the sum of its proper divisors (12245914880).

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

11895781312 is a wasteful number, since it uses less digits than its factorization.

11895781312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13277 (or 13267 counting only the distinct ones).

The product of its digits is 120960, while the sum is 46.

The spelling of 11895781312 in words is "eleven billion, eight hundred ninety-five million, seven hundred eighty-one thousand, three hundred twelve".