63041681 has 4 divisors (see below), whose sum is σ = 63929664. Its totient is φ = 62153700.

The previous prime is 63041647. The next prime is 63041687. The reversal of 63041681 is 18614036.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63041681 is a prime.

It is a super-2 number, since 2×63041681² = 7948507086611522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63041687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443885 + ... + 444026.

It is an arithmetic number, because the mean of its divisors is an integer number (15982416).

Almost surely, 2^63041681 is an apocalyptic number.

It is an amenable number.

63041681 is a deficient number, since it is larger than the sum of its proper divisors (887983).

63041681 is an equidigital number, since it uses as much as digits as its factorization.

63041681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887982.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 63041681 is about 7939.8791552517. The cubic root of 63041681 is about 397.9934533405.

The spelling of 63041681 in words is "sixty-three million, forty-one thousand, six hundred eighty-one".