61394432842 has 8 divisors (see below), whose sum is σ = 97508805156. Its totient is φ = 28891497792.

The previous prime is 61394432833. The next prime is 61394432857. The reversal of 61394432842 is 24823449316.

61394432842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 247779²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 61394432841 + 1 = 247779^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 61394432792 and 61394432801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902859273 + ... + 902859340.

Almost surely, 2^61394432842 is an apocalyptic number.

61394432842 is a deficient number, since it is larger than the sum of its proper divisors (36114372314).

61394432842 is a wasteful number, since it uses less digits than its factorization.

61394432842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805718632.

The product of its digits is 995328, while the sum is 46.

The spelling of 61394432842 in words is "sixty-one billion, three hundred ninety-four million, four hundred thirty-two thousand, eight hundred forty-two".