61672443785 has 24 divisors (see below), whose sum is σ = 77679907200. Its totient is φ = 46982879424.

The previous prime is 61672443769. The next prime is 61672443803. The reversal of 61672443785 is 58734427616.

It is not a de Polignac number, because 61672443785 - 2⁴ = 61672443769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225866 + ... + 417564.

It is an arithmetic number, because the mean of its divisors is an integer number (3236662800).

Almost surely, 2^61672443785 is an apocalyptic number.

It is an amenable number.

61672443785 is a deficient number, since it is larger than the sum of its proper divisors (16007463415).

61672443785 is a wasteful number, since it uses less digits than its factorization.

61672443785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191825 (or 191788 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 53.

The spelling of 61672443785 in words is "sixty-one billion, six hundred seventy-two million, four hundred forty-three thousand, seven hundred eighty-five".