63405145 has 8 divisors (see below), whose sum is σ = 76180104. Its totient is φ = 50661504.

The previous prime is 63405127. The next prime is 63405157. The reversal of 63405145 is 54150436.

It can be written as a sum of positive squares in 4 ways, for example, as 15116544 + 48288601 = 3888^2 + 6949^2 .

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 63405145 - 2²¹ = 61307993 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, 3114 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (9522513).

Almost surely, 2^63405145 is an apocalyptic number.

It is an amenable number.

63405145 is a deficient number, since it is larger than the sum of its proper divisors (12774959).

63405145 is a wasteful number, since it uses less digits than its factorization.

63405145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15659.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 63405145 is about 7962.7347689095. The cubic root of 63405145 is about 398.7568592551.

The spelling of 63405145 in words is "sixty-three million, four hundred five thousand, one hundred forty-five".