61839671958 has 48 divisors (see below), whose sum is σ = 137717099520. Its totient is φ = 20043504432.

The previous prime is 61839671953. The next prime is 61839672031. The reversal of 61839671958 is 85917693816.

61839671958 is a `hidden beast` number, since 618 + 3 + 9 + 6 + 7 + 1 + 9 + 5 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 61839671895 and 61839671904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61839671951) 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 23 ways as a sum of consecutive naturals, for example, 6538 + ... + 351741.

It is an arithmetic number, because the mean of its divisors is an integer number (2869106240).

Almost surely, 2^61839671958 is an apocalyptic number.

61839671958 is an abundant number, since it is smaller than the sum of its proper divisors (75877427562).

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

61839671958 is a wasteful number, since it uses less digits than its factorization.

61839671958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358553 (or 358550 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 61839671958 in words is "sixty-one billion, eight hundred thirty-nine million, six hundred seventy-one thousand, nine hundred fifty-eight".