63906055445 has 4 divisors (see below), whose sum is σ = 76687266540. Its totient is φ = 51124844352.

The previous prime is 63906055403. The next prime is 63906055459. The reversal of 63906055445 is 54455060936.

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 11731272721 + 52174782724 = 108311^2 + 228418^2 .

It is a cyclic number.

It is not a de Polignac number, because 63906055445 - 2²² = 63901861141 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 63906055445.

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, 6390605540 + ... + 6390605549.

It is an arithmetic number, because the mean of its divisors is an integer number (19171816635).

Almost surely, 2^63906055445 is an apocalyptic number.

It is an amenable number.

63906055445 is a deficient number, since it is larger than the sum of its proper divisors (12781211095).

63906055445 is a wasteful number, since it uses less digits than its factorization.

63906055445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12781211094.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 63906055445 in words is "sixty-three billion, nine hundred six million, fifty-five thousand, four hundred forty-five".