2638481468394 has 16 divisors (see below), whose sum is σ = 5276991085632. Its totient is φ = 879489131328.

The previous prime is 2638481468393. The next prime is 2638481468443. The reversal of 2638481468394 is 4938641848362.

It is not an unprimeable number, because it can be changed into a prime (2638481468393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162642 + ... + 2302914.

It is an arithmetic number, because the mean of its divisors is an integer number (329811942852).

Almost surely, 2^{2638481468394} is an apocalyptic number.

2638481468394 is an abundant number, since it is smaller than the sum of its proper divisors (2638509617238).

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

2638481468394 is a wasteful number, since it uses less digits than its factorization.

2638481468394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345741.

The product of its digits is 191102976, while the sum is 66.

The spelling of 2638481468394 in words is "two trillion, six hundred thirty-eight billion, four hundred eighty-one million, four hundred sixty-eight thousand, three hundred ninety-four".