2147921243648 has 40 divisors (see below), whose sum is σ = 4407637835832. Its totient is φ = 1044934649856.

The previous prime is 2147921243639. The next prime is 2147921243681. The reversal of 2147921243648 is 8463421297412.

It is a happy number.

It is a super-2 number, since 2×2147921243648² (a number of 25 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 2147921243648.

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, 56672390 + ... + 56710277.

Almost surely, 2^{2147921243648} is an apocalyptic number.

It is an amenable number.

2147921243648 is an abundant number, since it is smaller than the sum of its proper divisors (2259716592184).

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

2147921243648 is an equidigital number, since it uses as much as digits as its factorization.

2147921243648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113382722 (or 113382706 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The spelling of 2147921243648 in words is "two trillion, one hundred forty-seven billion, nine hundred twenty-one million, two hundred forty-three thousand, six hundred forty-eight".