11893451856 has 160 divisors (see below), whose sum is σ = 36778396032. Its totient is φ = 3263969280.

The previous prime is 11893451839. The next prime is 11893451951. The reversal of 11893451856 is 65815439811.

It is a junction number, because it is equal to n+sod(n) for n = 11893451799 and 11893451808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347446 + ... + 380138.

Almost surely, 2^11893451856 is an apocalyptic number.

11893451856 is a gapful number since it is divisible by the number (16) 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 11893451856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18389198016).

11893451856 is an abundant number, since it is smaller than the sum of its proper divisors (24884944176).

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

11893451856 is a wasteful number, since it uses less digits than its factorization.

11893451856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32781 (or 32775 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 51.

The spelling of 11893451856 in words is "eleven billion, eight hundred ninety-three million, four hundred fifty-one thousand, eight hundred fifty-six".