61673765894 has 96 divisors (see below), whose sum is σ = 108919404000. Its totient is φ = 26079086592.

The previous prime is 61673765891. The next prime is 61673765903. The reversal of 61673765894 is 49856737616.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61673765891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36951692 + ... + 36953360.

It is an arithmetic number, because the mean of its divisors is an integer number (1134577125).

Almost surely, 2^61673765894 is an apocalyptic number.

61673765894 is a deficient number, since it is larger than the sum of its proper divisors (47245638106).

61673765894 is a wasteful number, since it uses less digits than its factorization.

61673765894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1869 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 62.

The spelling of 61673765894 in words is "sixty-one billion, six hundred seventy-three million, seven hundred sixty-five thousand, eight hundred ninety-four".