2138712534 has 96 divisors (see below), whose sum is σ = 5427901440. Its totient is φ = 595921536.

The previous prime is 2138712533. The next prime is 2138712553. The reversal of 2138712534 is 4352178312.

2138712534 is a `hidden beast` number, since 21 + 38 + 71 + 2 + 534 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138712533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2421657 + ... + 2422539.

It is an arithmetic number, because the mean of its divisors is an integer number (56540640).

Almost surely, 2^2138712534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2138712534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2713950720).

2138712534 is an abundant number, since it is smaller than the sum of its proper divisors (3289188906).

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

2138712534 is a wasteful number, since it uses less digits than its factorization.

2138712534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354 (or 1351 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2138712534 is about 46246.2164290226. The cubic root of 2138712534 is about 1288.4002632361.

The spelling of 2138712534 in words is "two billion, one hundred thirty-eight million, seven hundred twelve thousand, five hundred thirty-four".