12311620454644 has 48 divisors (see below), whose sum is σ = 25507993383936. Its totient is φ = 5088030393600.

The previous prime is 12311620454641. The next prime is 12311620454677. The reversal of 12311620454644 is 44645402611321.

It is a super-2 number, since 2×12311620454644² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12311620454644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311620454641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24994339 + ... + 25482154.

It is an arithmetic number, because the mean of its divisors is an integer number (531416528832).

Almost surely, 2^{12311620454644} is an apocalyptic number.

12311620454644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12311620454644 is an abundant number, since it is smaller than the sum of its proper divisors (13196372929292).

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

12311620454644 is a wasteful number, since it uses less digits than its factorization.

12311620454644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50476816 (or 50476814 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 12311620454644 in words is "twelve trillion, three hundred eleven billion, six hundred twenty million, four hundred fifty-four thousand, six hundred forty-four".