2138681598 has 16 divisors (see below), whose sum is σ = 4303606656. Its totient is φ = 708519960.

The previous prime is 2138681579. The next prime is 2138681641. The reversal of 2138681598 is 8951868312.

It is a self number, because there is not a number n which added to its sum of digits gives 2138681598.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092418 + ... + 1094373.

It is an arithmetic number, because the mean of its divisors is an integer number (268975416).

Almost surely, 2^2138681598 is an apocalyptic number.

2138681598 is an abundant number, since it is smaller than the sum of its proper divisors (2164925058).

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

2138681598 is a wasteful number, since it uses less digits than its factorization.

2138681598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186959.

The product of its digits is 829440, while the sum is 51.

The square root of 2138681598 is about 46245.8819572078. The cubic root of 2138681598 is about 1288.3940510653.

The spelling of 2138681598 in words is "two billion, one hundred thirty-eight million, six hundred eighty-one thousand, five hundred ninety-eight".