654944225823 has 20 divisors (see below), whose sum is σ = 978863636520. Its totient is φ = 436410733392.

The previous prime is 654944225801. The next prime is 654944225843. The reversal of 654944225823 is 328522449456.

654944225823 is a `hidden beast` number, since 6 + 54 + 9 + 4 + 4 + 2 + 2 + 582 + 3 = 666.

It is not a de Polignac number, because 654944225823 - 2¹⁸ = 654943963679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654944225823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654944225843) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1862713 + ... + 2186226.

It is an arithmetic number, because the mean of its divisors is an integer number (48943181826).

Almost surely, 2^654944225823 is an apocalyptic number.

654944225823 is a deficient number, since it is larger than the sum of its proper divisors (323919410697).

654944225823 is a wasteful number, since it uses less digits than its factorization.

654944225823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050948 (or 4050939 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 654944225823 in words is "six hundred fifty-four billion, nine hundred forty-four million, two hundred twenty-five thousand, eight hundred twenty-three".