63945505 has 8 divisors (see below), whose sum is σ = 82637352. Its totient is φ = 47221248.

The previous prime is 63945491. The next prime is 63945533. The reversal of 63945505 is 50554936.

It can be written as a sum of positive squares in 4 ways, for example, as 73441 + 63872064 = 271^2 + 7992^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63945505 - 2¹¹ = 63943457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491824 + ... + 491953.

It is an arithmetic number, because the mean of its divisors is an integer number (10329669).

Almost surely, 2^63945505 is an apocalyptic number.

63945505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63945505 is a deficient number, since it is larger than the sum of its proper divisors (18691847).

63945505 is a wasteful number, since it uses less digits than its factorization.

63945505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983795.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 63945505 is about 7996.5933371655. The cubic root of 63945505 is about 399.8864365114.

The spelling of 63945505 in words is "sixty-three million, nine hundred forty-five thousand, five hundred five".