654980406817 has 4 divisors (see below), whose sum is σ = 714524080176. Its totient is φ = 595436733460.

The previous prime is 654980406811. The next prime is 654980406827. The reversal of 654980406817 is 718604089456.

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 a de Polignac number, because none of the positive numbers 2^k-654980406817 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654980406811) 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, 29771836663 + ... + 29771836684.

It is an arithmetic number, because the mean of its divisors is an integer number (178631020044).

Almost surely, 2^654980406817 is an apocalyptic number.

It is an amenable number.

654980406817 is a deficient number, since it is larger than the sum of its proper divisors (59543673359).

654980406817 is a wasteful number, since it uses less digits than its factorization.

654980406817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59543673358.

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 654980406817 in words is "six hundred fifty-four billion, nine hundred eighty million, four hundred six thousand, eight hundred seventeen".