1630144633 has 4 divisors (see below), whose sum is σ = 1755540388. Its totient is φ = 1504748880.

The previous prime is 1630144613. The next prime is 1630144643. The reversal of 1630144633 is 3364410361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 795916944 + 834227689 = 28212^2 + 28883^2 .

It is a cyclic number.

It is not a de Polignac number, because 1630144633 - 2¹³ = 1630136441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630144595 and 1630144604.

It is not an unprimeable number, because it can be changed into a prime (1630144613) 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, 62697858 + ... + 62697883.

It is an arithmetic number, because the mean of its divisors is an integer number (438885097).

Almost surely, 2^1630144633 is an apocalyptic number.

1630144633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1630144633 is a deficient number, since it is larger than the sum of its proper divisors (125395755).

1630144633 is a wasteful number, since it uses less digits than its factorization.

1630144633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125395754.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 1630144633 is about 40375.0496346444. The cubic root of 1630144633 is about 1176.9067295647.

Adding to 1630144633 its reverse (3364410361), we get a palindrome (4994554994).

The spelling of 1630144633 in words is "one billion, six hundred thirty million, one hundred forty-four thousand, six hundred thirty-three".