2139812604 has 36 divisors (see below), whose sum is σ = 5693655240. Its totient is φ = 675730080.

The previous prime is 2139812581. The next prime is 2139812641. The reversal of 2139812604 is 4062189312.

2139812604 is a `hidden beast` number, since 2 + 1 + 39 + 8 + 12 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1563507 + ... + 1564874.

It is an arithmetic number, because the mean of its divisors is an integer number (158157090).

Almost surely, 2^2139812604 is an apocalyptic number.

It is an amenable number.

2139812604 is an abundant number, since it is smaller than the sum of its proper divisors (3553842636).

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

2139812604 is a wasteful number, since it uses less digits than its factorization.

2139812604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128410 (or 3128405 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2139812604 is about 46258.1085216419. The cubic root of 2139812604 is about 1288.6211262581.

The spelling of 2139812604 in words is "two billion, one hundred thirty-nine million, eight hundred twelve thousand, six hundred four".