61821232839 has 6 divisors (see below), whose sum is σ = 89297336336. Its totient is φ = 41214155220.

The previous prime is 61821232807. The next prime is 61821232849. The reversal of 61821232839 is 93823212816.

61821232839 is a `hidden beast` number, since 618 + 2 + 1 + 2 + 3 + 28 + 3 + 9 = 666.

It is not a de Polignac number, because 61821232839 - 2⁵ = 61821232807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61821232794 and 61821232803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61821232849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3434512927 + ... + 3434512944.

Almost surely, 2^61821232839 is an apocalyptic number.

61821232839 is a deficient number, since it is larger than the sum of its proper divisors (27476103497).

61821232839 is a wasteful number, since it uses less digits than its factorization.

61821232839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869025877 (or 6869025874 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 61821232839 in words is "sixty-one billion, eight hundred twenty-one million, two hundred thirty-two thousand, eight hundred thirty-nine".