63146681 has 6 divisors (see below), whose sum is σ = 68377950. Its totient is φ = 58289088.

The previous prime is 63146641. The next prime is 63146693. The reversal of 63146681 is 18664136.

It can be written as a sum of positive squares in 3 ways, for example, as 341056 + 62805625 = 584^2 + 7925^2 .

It is not a de Polignac number, because 63146681 - 2⁶ = 63146617 is a prime.

It is a super-2 number, since 2×63146681² = 7975006642631522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63146621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 186656 + ... + 186993.

It is an arithmetic number, because the mean of its divisors is an integer number (11396325).

Almost surely, 2^63146681 is an apocalyptic number.

It is an amenable number.

63146681 is a deficient number, since it is larger than the sum of its proper divisors (5231269).

63146681 is a wasteful number, since it uses less digits than its factorization.

63146681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373675 (or 373662 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 63146681 is about 7946.4885955999. The cubic root of 63146681 is about 398.2142920641.

The spelling of 63146681 in words is "sixty-three million, one hundred forty-six thousand, six hundred eighty-one".