2139856596 has 24 divisors (see below), whose sum is σ = 5547776640. Its totient is φ = 713285496.

The previous prime is 2139856591. The next prime is 2139856603. The reversal of 2139856596 is 6956589312.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139856591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9906636 + ... + 9906851.

It is an arithmetic number, because the mean of its divisors is an integer number (231157360).

Almost surely, 2^2139856596 is an apocalyptic number.

It is an amenable number.

2139856596 is an abundant number, since it is smaller than the sum of its proper divisors (3407920044).

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

2139856596 is a wasteful number, since it uses less digits than its factorization.

2139856596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19813500 (or 19813492 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 2139856596 is about 46258.5840250218. The cubic root of 2139856596 is about 1288.6299570364.

The spelling of 2139856596 in words is "two billion, one hundred thirty-nine million, eight hundred fifty-six thousand, five hundred ninety-six".