1631140405 has 32 divisors (see below), whose sum is σ = 2125647360. Its totient is φ = 1197619200.

The previous prime is 1631140403. The next prime is 1631140453. The reversal of 1631140405 is 5040411361.

It is not a de Polignac number, because 1631140405 - 2¹ = 1631140403 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1631140405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631140403) 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, 449157 + ... + 452773.

It is an arithmetic number, because the mean of its divisors is an integer number (66426480).

Almost surely, 2^1631140405 is an apocalyptic number.

It is an amenable number.

1631140405 is a deficient number, since it is larger than the sum of its proper divisors (494506955).

1631140405 is a wasteful number, since it uses less digits than its factorization.

1631140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1631140405 is about 40387.3792786806. The cubic root of 1631140405 is about 1177.1463181674.

Adding to 1631140405 its reverse (5040411361), we get a palindrome (6671551766).

The spelling of 1631140405 in words is "one billion, six hundred thirty-one million, one hundred forty thousand, four hundred five".