11631780336 has 120 divisors (see below), whose sum is σ = 33732340992. Its totient is φ = 3449705600.

The previous prime is 11631780323. The next prime is 11631780359. The reversal of 11631780336 is 63308713611.

It is a super-3 number, since 3×11631780336³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11631780294 and 11631780303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251671 + ... + 294281.

Almost surely, 2^11631780336 is an apocalyptic number.

11631780336 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 11631780336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16866170496).

11631780336 is an abundant number, since it is smaller than the sum of its proper divisors (22100560656).

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

11631780336 is a wasteful number, since it uses less digits than its factorization.

11631780336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42691 (or 42674 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 11631780336 in words is "eleven billion, six hundred thirty-one million, seven hundred eighty thousand, three hundred thirty-six".