1630444401 has 24 divisors (see below), whose sum is σ = 2461021056. Its totient is φ = 1038206400.

The previous prime is 1630444379. The next prime is 1630444463. The reversal of 1630444401 is 1044440361.

It is not a de Polignac number, because 1630444401 - 2¹⁵ = 1630411633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630444481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148501 + ... + 159101.

It is an arithmetic number, because the mean of its divisors is an integer number (102542544).

Almost surely, 2^1630444401 is an apocalyptic number.

It is an amenable number.

1630444401 is a deficient number, since it is larger than the sum of its proper divisors (830576655).

1630444401 is a wasteful number, since it uses less digits than its factorization.

1630444401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11373 (or 11370 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1630444401 is about 40378.7617566463. The cubic root of 1630444401 is about 1176.9788657719.

Adding to 1630444401 its reverse (1044440361), we get a palindrome (2674884762).

The spelling of 1630444401 in words is "one billion, six hundred thirty million, four hundred forty-four thousand, four hundred one".