61771262520728 has 32 divisors (see below), whose sum is σ = 116739192729600. Its totient is φ = 30640836536352.

The previous prime is 61771262520661. The next prime is 61771262520731. The reversal of 61771262520728 is 82702526217716.

It is a happy number.

61771262520728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17988701 + ... + 21145587.

It is an arithmetic number, because the mean of its divisors is an integer number (3648099772800).

Almost surely, 2^{61771262520728} is an apocalyptic number.

It is an amenable number.

61771262520728 is a deficient number, since it is larger than the sum of its proper divisors (54967930208872).

61771262520728 is a wasteful number, since it uses less digits than its factorization.

61771262520728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176279 (or 3176275 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 61771262520728 in words is "sixty-one trillion, seven hundred seventy-one billion, two hundred sixty-two million, five hundred twenty thousand, seven hundred twenty-eight".