40864600649 has 2 divisors, whose sum is σ = 40864600650. Its totient is φ = 40864600648.

The previous prime is 40864600631. The next prime is 40864600729. The reversal of 40864600649 is 94600646804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34955911225 + 5908689424 = 186965^2 + 76868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40864600649 is a prime.

It is not a weakly prime, because it can be changed into another prime (40864600619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432300324 + 20432300325.

It is an arithmetic number, because the mean of its divisors is an integer number (20432300325).

Almost surely, 2^40864600649 is an apocalyptic number.

It is an amenable number.

40864600649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40864600649 is an equidigital number, since it uses as much as digits as its factorization.

40864600649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 40864600649 in words is "forty billion, eight hundred sixty-four million, six hundred thousand, six hundred forty-nine".