2139149826 has 72 divisors (see below), whose sum is σ = 5183307792. Its totient is φ = 632318400.

The previous prime is 2139149819. The next prime is 2139149833. The reversal of 2139149826 is 6289419312.

2139149826 is a `hidden beast` number, since 2 + 139 + 1 + 498 + 26 = 666.

It is an interprime number because it is at equal distance from previous prime (2139149819) and next prime (2139149833).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 329625 + ... + 336051.

It is an arithmetic number, because the mean of its divisors is an integer number (71990386).

Almost surely, 2^2139149826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139149826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2591653896).

2139149826 is an abundant number, since it is smaller than the sum of its proper divisors (3044157966).

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

2139149826 is a wasteful number, since it uses less digits than its factorization.

2139149826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6528 (or 6484 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 2139149826 is about 46250.9440552298. The cubic root of 2139149826 is about 1288.4880682004.

It can be divided in two parts, 21391 and 49826, that added together give a palindrome (71217).

The spelling of 2139149826 in words is "two billion, one hundred thirty-nine million, one hundred forty-nine thousand, eight hundred twenty-six".