29991677605 has 4 divisors (see below), whose sum is σ = 35990013132. Its totient is φ = 23993342080.

The previous prime is 29991677561. The next prime is 29991677633. The reversal of 29991677605 is 50677619992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11450498049 + 18541179556 = 107007^2 + 136166^2 .

It is not a de Polignac number, because 29991677605 - 2¹¹ = 29991675557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999167756 + ... + 2999167765.

It is an arithmetic number, because the mean of its divisors is an integer number (8997503283).

Almost surely, 2^29991677605 is an apocalyptic number.

It is an amenable number.

29991677605 is a deficient number, since it is larger than the sum of its proper divisors (5998335527).

29991677605 is an equidigital number, since it uses as much as digits as its factorization.

29991677605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998335526.

The product of its (nonzero) digits is 12859560, while the sum is 61.

The spelling of 29991677605 in words is "twenty-nine billion, nine hundred ninety-one million, six hundred seventy-seven thousand, six hundred five".