654705871644 has 24 divisors (see below), whose sum is σ = 1666524037248. Its totient is φ = 198395718640.

The previous prime is 654705871643. The next prime is 654705871667. The reversal of 654705871644 is 446178507456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654705871643) 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 7 ways as a sum of consecutive naturals, for example, 2479946352 + ... + 2479946615.

It is an arithmetic number, because the mean of its divisors is an integer number (69438501552).

Almost surely, 2^654705871644 is an apocalyptic number.

It is an amenable number.

654705871644 is an abundant number, since it is smaller than the sum of its proper divisors (1011818165604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

654705871644 is a wasteful number, since it uses less digits than its factorization.

654705871644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4959892985 (or 4959892983 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 654705871644 in words is "six hundred fifty-four billion, seven hundred five million, eight hundred seventy-one thousand, six hundred forty-four".