1631045009 has 8 divisors (see below), whose sum is σ = 1797666528. Its totient is φ = 1467480960.

The previous prime is 1631044979. The next prime is 1631045021. The reversal of 1631045009 is 9005401361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1631045009 - 2²⁸ = 1362609553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631045099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763247 + ... + 765380.

It is an arithmetic number, because the mean of its divisors is an integer number (224708316).

Almost surely, 2^1631045009 is an apocalyptic number.

It is an amenable number.

1631045009 is a deficient number, since it is larger than the sum of its proper divisors (166621519).

1631045009 is a wasteful number, since it uses less digits than its factorization.

1631045009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528735.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1631045009 is about 40386.1982489068. The cubic root of 1631045009 is about 1177.1233695524.

The spelling of 1631045009 in words is "one billion, six hundred thirty-one million, forty-five thousand, nine".