61109755204801 has 4 divisors (see below), whose sum is σ = 61167899597104. Its totient is φ = 61051610812500.

The previous prime is 61109755204789. The next prime is 61109755204811. The reversal of 61109755204801 is 10840255790116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61109755204801 - 2¹¹ = 61109755202753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61109755204811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29072194575 + ... + 29072196676.

It is an arithmetic number, because the mean of its divisors is an integer number (15291974899276).

Almost surely, 2^{61109755204801} is an apocalyptic number.

It is an amenable number.

61109755204801 is a deficient number, since it is larger than the sum of its proper divisors (58144392303).

61109755204801 is a wasteful number, since it uses less digits than its factorization.

61109755204801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58144392302.

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 61109755204801 in words is "sixty-one trillion, one hundred nine billion, seven hundred fifty-five million, two hundred four thousand, eight hundred one".