6136845821 has 4 divisors (see below), whose sum is σ = 6137049600. Its totient is φ = 6136642044.

The previous prime is 6136845811. The next prime is 6136845833. The reversal of 6136845821 is 1285486316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6136845821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6136845811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46781 + ... + 120258.

It is an arithmetic number, because the mean of its divisors is an integer number (1534262400).

Almost surely, 2^6136845821 is an apocalyptic number.

It is an amenable number.

6136845821 is a deficient number, since it is larger than the sum of its proper divisors (203779).

6136845821 is a wasteful number, since it uses less digits than its factorization.

6136845821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203778.

The product of its digits is 276480, while the sum is 44.

The square root of 6136845821 is about 78338.0228305514. The cubic root of 6136845821 is about 1830.8316187004.

The spelling of 6136845821 in words is "six billion, one hundred thirty-six million, eight hundred forty-five thousand, eight hundred twenty-one".