29809197509 has 16 divisors (see below), whose sum is σ = 37289696640. Its totient is φ = 23198650560.

The previous prime is 29809197503. The next prime is 29809197511. The reversal of 29809197509 is 90579190892.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29809197509 is a prime.

It is a super-2 number, since 2×29809197509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29809197503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2679479 + ... + 2690580.

It is an arithmetic number, because the mean of its divisors is an integer number (2330606040).

Almost surely, 2^29809197509 is an apocalyptic number.

It is an amenable number.

29809197509 is a deficient number, since it is larger than the sum of its proper divisors (7480499131).

29809197509 is a wasteful number, since it uses less digits than its factorization.

29809197509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370140.

The product of its (nonzero) digits is 3674160, while the sum is 59.

The spelling of 29809197509 in words is "twenty-nine billion, eight hundred nine million, one hundred ninety-seven thousand, five hundred nine".