1641625009 has 8 divisors (see below), whose sum is σ = 1762674048. Its totient is φ = 1523296320.

The previous prime is 1641625003. The next prime is 1641625031. The reversal of 1641625009 is 9005261461.

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

It is a cyclic number.

It is not a de Polignac number, because 1641625009 - 2²⁹ = 1104754097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641625003) 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, 678837 + ... + 681250.

It is an arithmetic number, because the mean of its divisors is an integer number (220334256).

Almost surely, 2^1641625009 is an apocalyptic number.

It is an amenable number.

1641625009 is a deficient number, since it is larger than the sum of its proper divisors (121049039).

1641625009 is a wasteful number, since it uses less digits than its factorization.

1641625009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360175.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1641625009 is about 40516.9718636524. The cubic root of 1641625009 is about 1179.6630774655.

The spelling of 1641625009 in words is "one billion, six hundred forty-one million, six hundred twenty-five thousand, nine".