61786439349 has 8 divisors (see below), whose sum is σ = 82393584960. Its totient is φ = 41185126656.

The previous prime is 61786439339. The next prime is 61786439387. The reversal of 61786439349 is 94393468716.

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

It is not a de Polignac number, because 61786439349 - 2¹¹ = 61786437301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61786439292 and 61786439301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61786439339) 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 7 ways as a sum of consecutive naturals, for example, 1433452 + ... + 1475925.

It is an arithmetic number, because the mean of its divisors is an integer number (10299198120).

Almost surely, 2^61786439349 is an apocalyptic number.

It is an amenable number.

61786439349 is a deficient number, since it is larger than the sum of its proper divisors (20607145611).

61786439349 is a wasteful number, since it uses less digits than its factorization.

61786439349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916459.

The product of its digits is 23514624, while the sum is 60.

The spelling of 61786439349 in words is "sixty-one billion, seven hundred eighty-six million, four hundred thirty-nine thousand, three hundred forty-nine".