61641318075 has 24 divisors (see below), whose sum is σ = 104283736128. Its totient is φ = 32110824480.

The previous prime is 61641318073. The next prime is 61641318121. The reversal of 61641318075 is 57081314616.

It is not a de Polignac number, because 61641318075 - 2¹ = 61641318073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61641318073) 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 23 ways as a sum of consecutive naturals, for example, 9553569 + ... + 9560018.

It is an arithmetic number, because the mean of its divisors is an integer number (4345155672).

Almost surely, 2^61641318075 is an apocalyptic number.

61641318075 is a deficient number, since it is larger than the sum of its proper divisors (42642418053).

61641318075 is a wasteful number, since it uses less digits than its factorization.

61641318075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19113643 (or 19113638 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 61641318075 in words is "sixty-one billion, six hundred forty-one million, three hundred eighteen thousand, seventy-five".