54643660061 has 4 divisors (see below), whose sum is σ = 57019471392. Its totient is φ = 52267848732.

The previous prime is 54643660007. The next prime is 54643660063. The reversal of 54643660061 is 16006634645.

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 54643660061 - 2¹⁸ = 54643397917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54643660063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187905631 + ... + 1187905676.

It is an arithmetic number, because the mean of its divisors is an integer number (14254867848).

Almost surely, 2^54643660061 is an apocalyptic number.

It is an amenable number.

54643660061 is a deficient number, since it is larger than the sum of its proper divisors (2375811331).

54643660061 is a wasteful number, since it uses less digits than its factorization.

54643660061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375811330.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 54643660061 in words is "fifty-four billion, six hundred forty-three million, six hundred sixty thousand, sixty-one".