63149881 has 16 divisors (see below), whose sum is σ = 68076288. Its totient is φ = 58432000.

The previous prime is 63149873. The next prime is 63149893. The reversal of 63149881 is 18894136.

It is a cyclic number.

It is not a de Polignac number, because 63149881 - 2³ = 63149873 is a prime.

It is a super-2 number, since 2×63149881² = 7975814940628322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63149831) 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, 157281 + ... + 157681.

It is an arithmetic number, because the mean of its divisors is an integer number (4254768).

Almost surely, 2^63149881 is an apocalyptic number.

It is an amenable number.

63149881 is a deficient number, since it is larger than the sum of its proper divisors (4926407).

63149881 is a wasteful number, since it uses less digits than its factorization.

63149881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its digits is 41472, while the sum is 40.

The square root of 63149881 is about 7946.6899398429. The cubic root of 63149881 is about 398.2210185418.

The spelling of 63149881 in words is "sixty-three million, one hundred forty-nine thousand, eight hundred eighty-one".