61211897075 has 24 divisors (see below), whose sum is σ = 89544268800. Its totient is φ = 40619872800.

The previous prime is 61211897057. The next prime is 61211897077. The reversal of 61211897075 is 57079811216.

It is not a de Polignac number, because 61211897075 - 2³⁰ = 60138155251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61211897077) 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 23 ways as a sum of consecutive naturals, for example, 5636225 + ... + 5647074.

It is an arithmetic number, because the mean of its divisors is an integer number (3731011200).

Almost surely, 2^61211897075 is an apocalyptic number.

61211897075 is a deficient number, since it is larger than the sum of its proper divisors (28332371725).

61211897075 is a wasteful number, since it uses less digits than its factorization.

61211897075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11283347 (or 11283342 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 47.

The spelling of 61211897075 in words is "sixty-one billion, two hundred eleven million, eight hundred ninety-seven thousand, seventy-five".