633665248649 has 2 divisors, whose sum is σ = 633665248650. Its totient is φ = 633665248648.

The previous prime is 633665248631. The next prime is 633665248661. The reversal of 633665248649 is 946842566336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342847723024 + 290817525625 = 585532^2 + 539275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-633665248649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 633665248591 and 633665248600.

It is not a weakly prime, because it can be changed into another prime (633665248049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316832624324 + 316832624325.

It is an arithmetic number, because the mean of its divisors is an integer number (316832624325).

Almost surely, 2^633665248649 is an apocalyptic number.

It is an amenable number.

633665248649 is a deficient number, since it is larger than the sum of its proper divisors (1).

633665248649 is an equidigital number, since it uses as much as digits as its factorization.

633665248649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134369280, while the sum is 62.

The spelling of 633665248649 in words is "six hundred thirty-three billion, six hundred sixty-five million, two hundred forty-eight thousand, six hundred forty-nine".