11421979680 has 48 divisors (see below), whose sum is σ = 35979237504. Its totient is φ = 3045861120.

The previous prime is 11421979633. The next prime is 11421979693. The reversal of 11421979680 is 8697912411.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 11897416 + ... + 11898375.

It is an arithmetic number, because the mean of its divisors is an integer number (749567448).

Almost surely, 2^11421979680 is an apocalyptic number.

11421979680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421979680 is an abundant number, since it is smaller than the sum of its proper divisors (24557257824).

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

11421979680 is a wasteful number, since it uses less digits than its factorization.

11421979680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23795809 (or 23795801 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 11421979680 in words is "eleven billion, four hundred twenty-one million, nine hundred seventy-nine thousand, six hundred eighty".