63440314406605 has 4 divisors (see below), whose sum is σ = 76128377287932. Its totient is φ = 50752251525280.

The previous prime is 63440314406593. The next prime is 63440314406611. The reversal of 63440314406605 is 50660441304436.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33977369238121 + 29462945168484 = 5829011^2 + 5427978^2 .

It is a de Polignac number, because none of the positive numbers 2^k-63440314406605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6344031440656 + ... + 6344031440665.

It is an arithmetic number, because the mean of its divisors is an integer number (19032094321983).

Almost surely, 2^{63440314406605} is an apocalyptic number.

It is an amenable number.

63440314406605 is a deficient number, since it is larger than the sum of its proper divisors (12688062881327).

63440314406605 is a wasteful number, since it uses less digits than its factorization.

63440314406605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12688062881326.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 63440314406605 in words is "sixty-three trillion, four hundred forty billion, three hundred fourteen million, four hundred six thousand, six hundred five".