654528517649 has 2 divisors, whose sum is σ = 654528517650. Its totient is φ = 654528517648.

The previous prime is 654528517633. The next prime is 654528517693. The reversal of 654528517649 is 946715825456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434386446400 + 220142071249 = 659080^2 + 469193^2 .

It is a cyclic number.

It is not a de Polignac number, because 654528517649 - 2⁴ = 654528517633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654528517591 and 654528517600.

It is not a weakly prime, because it can be changed into another prime (654528519649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327264258824 + 327264258825.

It is an arithmetic number, because the mean of its divisors is an integer number (327264258825).

Almost surely, 2^654528517649 is an apocalyptic number.

It is an amenable number.

654528517649 is a deficient number, since it is larger than the sum of its proper divisors (1).

654528517649 is an equidigital number, since it uses as much as digits as its factorization.

654528517649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576000, while the sum is 62.

The spelling of 654528517649 in words is "six hundred fifty-four billion, five hundred twenty-eight million, five hundred seventeen thousand, six hundred forty-nine".