61173059549 has 16 divisors (see below), whose sum is σ = 70052121600. Its totient is φ = 52329106944.

The previous prime is 61173059473. The next prime is 61173059567. The reversal of 61173059549 is 94595037116.

It is a cyclic number.

It is not a de Polignac number, because 61173059549 - 2⁸ = 61173059293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61173059497 and 61173059506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61173059579) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13184372 + ... + 13189010.

It is an arithmetic number, because the mean of its divisors is an integer number (4378257600).

Almost surely, 2^61173059549 is an apocalyptic number.

It is an amenable number.

61173059549 is a deficient number, since it is larger than the sum of its proper divisors (8879062051).

61173059549 is a wasteful number, since it uses less digits than its factorization.

61173059549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8012.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 61173059549 in words is "sixty-one billion, one hundred seventy-three million, fifty-nine thousand, five hundred forty-nine".