12538754418440 has 64 divisors (see below), whose sum is σ = 30249861868800. Its totient is φ = 4660719418368.

The previous prime is 12538754418329. The next prime is 12538754418481. The reversal of 12538754418440 is 4481445783521.

It is a super-2 number, since 2×12538754418440² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116650994 + ... + 116758433.

It is an arithmetic number, because the mean of its divisors is an integer number (472654091700).

Almost surely, 2^{12538754418440} is an apocalyptic number.

12538754418440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12538754418440 is an abundant number, since it is smaller than the sum of its proper divisors (17711107450360).

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

12538754418440 is a wasteful number, since it uses less digits than its factorization.

12538754418440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233409534 (or 233409530 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 56.

The spelling of 12538754418440 in words is "twelve trillion, five hundred thirty-eight billion, seven hundred fifty-four million, four hundred eighteen thousand, four hundred forty".