12440277690528 has 96 divisors (see below), whose sum is σ = 33280059447936. Its totient is φ = 4067517662208.

The previous prime is 12440277690521. The next prime is 12440277690539. The reversal of 12440277690528 is 82509677204421.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (12440277690521) 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, 20526501 + ... + 21123867.

It is an arithmetic number, because the mean of its divisors is an integer number (346667285916).

Almost surely, 2^{12440277690528} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12440277690528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16640029723968).

12440277690528 is an abundant number, since it is smaller than the sum of its proper divisors (20839781757408).

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

12440277690528 is a wasteful number, since it uses less digits than its factorization.

12440277690528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601526 (or 601518 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 57.

The spelling of 12440277690528 in words is "twelve trillion, four hundred forty billion, two hundred seventy-seven million, six hundred ninety thousand, five hundred twenty-eight".