63652581 has 16 divisors (see below), whose sum is σ = 94755520. Its totient is φ = 42230160.

The previous prime is 63652577. The next prime is 63652583. The reversal of 63652581 is 18525636.

It is not a de Polignac number, because 63652581 - 2² = 63652577 is a prime.

It is a super-2 number, since 2×63652581² = 8103302135923122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63652583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111 + ... + 11283.

It is an arithmetic number, because the mean of its divisors is an integer number (5922220).

Almost surely, 2^63652581 is an apocalyptic number.

It is an amenable number.

63652581 is a deficient number, since it is larger than the sum of its proper divisors (31102939).

63652581 is a wasteful number, since it uses less digits than its factorization.

63652581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11393 (or 11387 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 63652581 is about 7978.2567644818. The cubic root of 63652581 is about 399.2748967742.

The spelling of 63652581 in words is "sixty-three million, six hundred fifty-two thousand, five hundred eighty-one".