2138686458741 has 64 divisors (see below), whose sum is σ = 3630207651840. Its totient is φ = 1219020736320.

The previous prime is 2138686458737. The next prime is 2138686458749. The reversal of 2138686458741 is 1478546868312.

2138686458741 is a `hidden beast` number, since 2 + 1 + 3 + 8 + 6 + 8 + 6 + 4 + 587 + 41 = 666.

It is not a de Polignac number, because 2138686458741 - 2² = 2138686458737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138686458749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 217983726 + ... + 217993536.

It is an arithmetic number, because the mean of its divisors is an integer number (56721994560).

Almost surely, 2^{2138686458741} is an apocalyptic number.

2138686458741 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2138686458741 is a deficient number, since it is larger than the sum of its proper divisors (1491521193099).

2138686458741 is a wasteful number, since it uses less digits than its factorization.

2138686458741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623 (or 12617 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 2138686458741 in words is "two trillion, one hundred thirty-eight billion, six hundred eighty-six million, four hundred fifty-eight thousand, seven hundred forty-one".