2138456249472 has 64 divisors (see below), whose sum is σ = 5685005259360. Its totient is φ = 712225075200.

The previous prime is 2138456249407. The next prime is 2138456249473. The reversal of 2138456249472 is 2749426548312.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (2138456249473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1857258 + ... + 2779625.

Almost surely, 2^{2138456249472} is an apocalyptic number.

It is an amenable number.

2138456249472 is an abundant number, since it is smaller than the sum of its proper divisors (3546549009888).

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

2138456249472 is a wasteful number, since it uses less digits than its factorization.

2138456249472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638101 (or 4638089 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 57.

The spelling of 2138456249472 in words is "two trillion, one hundred thirty-eight billion, four hundred fifty-six million, two hundred forty-nine thousand, four hundred seventy-two".