63815081 has 8 divisors (see below), whose sum is σ = 71862528. Its totient is φ = 56142000.

The previous prime is 63815071. The next prime is 63815099. The reversal of 63815081 is 18051836.

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 63815081 - 2²² = 59620777 is a prime.

It is a super-2 number, since 2×63815081² = 8144729126073122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63815071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93230 + ... + 93911.

It is an arithmetic number, because the mean of its divisors is an integer number (8982816).

Almost surely, 2^63815081 is an apocalyptic number.

It is an amenable number.

63815081 is a deficient number, since it is larger than the sum of its proper divisors (8047447).

63815081 is a wasteful number, since it uses less digits than its factorization.

63815081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187183.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 63815081 is about 7988.4342020198. The cubic root of 63815081 is about 399.6143804467.

The spelling of 63815081 in words is "sixty-three million, eight hundred fifteen thousand, eighty-one".