2138458574091 has 16 divisors (see below), whose sum is σ = 3258699046400. Its totient is φ = 1221940513728.

The previous prime is 2138458574033. The next prime is 2138458574107. The reversal of 2138458574091 is 1904758548312.

It is not a de Polignac number, because 2138458574091 - 2⁶ = 2138458574027 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2138458574011) 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 15 ways as a sum of consecutive naturals, for example, 750106 + ... + 2199903.

It is an arithmetic number, because the mean of its divisors is an integer number (203668690400).

Almost surely, 2^{2138458574091} is an apocalyptic number.

2138458574091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2138458574091 is a deficient number, since it is larger than the sum of its proper divisors (1120240472309).

2138458574091 is a wasteful number, since it uses less digits than its factorization.

2138458574091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984538.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 2138458574091 in words is "two trillion, one hundred thirty-eight billion, four hundred fifty-eight million, five hundred seventy-four thousand, ninety-one".