1633648881 has 32 divisors (see below), whose sum is σ = 2385911808. Its totient is φ = 989809920.

The previous prime is 1633648871. The next prime is 1633648903. The reversal of 1633648881 is 1888463361.

It is not a de Polignac number, because 1633648881 - 2³⁰ = 559907057 is a prime.

It is a super-2 number, since 2×1633648881² = 5337617332785104322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1633648881.

It is not an unprimeable number, because it can be changed into a prime (1633648871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1015780 + ... + 1017386.

It is an arithmetic number, because the mean of its divisors is an integer number (74559744).

Almost surely, 2^1633648881 is an apocalyptic number.

It is an amenable number.

1633648881 is a deficient number, since it is larger than the sum of its proper divisors (752262927).

1633648881 is a wasteful number, since it uses less digits than its factorization.

1633648881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

The product of its digits is 663552, while the sum is 48.

The square root of 1633648881 is about 40418.4225446763. The cubic root of 1633648881 is about 1177.7494403507.

The spelling of 1633648881 in words is "one billion, six hundred thirty-three million, six hundred forty-eight thousand, eight hundred eighty-one".