11421563136 has 72 divisors (see below), whose sum is σ = 30637630464. Its totient is φ = 3777177600.

The previous prime is 11421563129. The next prime is 11421563143. The reversal of 11421563136 is 63136512411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11421563129) and next prime (11421563143).

It is a junction number, because it is equal to n+sod(n) for n = 11421563097 and 11421563106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38986 + ... + 156086.

Almost surely, 2^11421563136 is an apocalyptic number.

11421563136 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 11421563136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15318815232).

11421563136 is an abundant number, since it is smaller than the sum of its proper divisors (19216067328).

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

11421563136 is a wasteful number, since it uses less digits than its factorization.

11421563136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117247 (or 117233 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The spelling of 11421563136 in words is "eleven billion, four hundred twenty-one million, five hundred sixty-three thousand, one hundred thirty-six".