11821620721632 has 24 divisors (see below), whose sum is σ = 31031754394536. Its totient is φ = 3940540240512.

The previous prime is 11821620721607. The next prime is 11821620721699. The reversal of 11821620721632 is 23612702612811.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×11821620721632² (a number of 27 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 3 ways as a sum of consecutive naturals, for example, 61570941163 + ... + 61570941354.

It is an arithmetic number, because the mean of its divisors is an integer number (1292989766439).

Almost surely, 2^{11821620721632} is an apocalyptic number.

11821620721632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11821620721632 is an abundant number, since it is smaller than the sum of its proper divisors (19210133672904).

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

11821620721632 is a wasteful number, since it uses less digits than its factorization.

11821620721632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123141882530 (or 123141882522 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 11821620721632 in words is "eleven trillion, eight hundred twenty-one billion, six hundred twenty million, seven hundred twenty-one thousand, six hundred thirty-two".