548608720661 has 16 divisors (see below), whose sum is σ = 564227769600. Its totient is φ = 533187240768.

The previous prime is 548608720657. The next prime is 548608720711. The reversal of 548608720661 is 166027806845.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 548608720661 - 2² = 548608720657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (548608723661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29840570 + ... + 29858948.

It is an arithmetic number, because the mean of its divisors is an integer number (35264235600).

Almost surely, 2^548608720661 is an apocalyptic number.

It is an amenable number.

548608720661 is a deficient number, since it is larger than the sum of its proper divisors (15619048939).

548608720661 is a wasteful number, since it uses less digits than its factorization.

548608720661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23708.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 548608720661 in words is "five hundred forty-eight billion, six hundred eight million, seven hundred twenty thousand, six hundred sixty-one".