5631438901 has 4 divisors (see below), whose sum is σ = 6143387904. Its totient is φ = 5119489900.

The previous prime is 5631438871. The next prime is 5631438913. The reversal of 5631438901 is 1098341365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5631438901 - 2⁷ = 5631438773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631438301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255974485 + ... + 255974506.

It is an arithmetic number, because the mean of its divisors is an integer number (1535846976).

Almost surely, 2^5631438901 is an apocalyptic number.

It is an amenable number.

5631438901 is a deficient number, since it is larger than the sum of its proper divisors (511949003).

5631438901 is a wasteful number, since it uses less digits than its factorization.

5631438901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511949002.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 5631438901 is about 75042.9137294122. The cubic root of 5631438901 is about 1779.1249855971.

The spelling of 5631438901 in words is "five billion, six hundred thirty-one million, four hundred thirty-eight thousand, nine hundred one".