61443664592 has 40 divisors (see below), whose sum is σ = 120463691616. Its totient is φ = 30357714816.

The previous prime is 61443664559. The next prime is 61443664649. The reversal of 61443664592 is 29546634416.

It is a self number, because there is not a number n which added to its sum of digits gives 61443664592.

It is a congruent number.

It is an unprimeable number.

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, 634463 + ... + 724865.

Almost surely, 2^61443664592 is an apocalyptic number.

It is an amenable number.

61443664592 is a deficient number, since it is larger than the sum of its proper divisors (59020027024).

61443664592 is a wasteful number, since it uses less digits than its factorization.

61443664592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90915 (or 90909 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 50.

The spelling of 61443664592 in words is "sixty-one billion, four hundred forty-three million, six hundred sixty-four thousand, five hundred ninety-two".