29656420805 has 8 divisors (see below), whose sum is σ = 38822950944. Its totient is φ = 21568306000.

The previous prime is 29656420793. The next prime is 29656420811. The reversal of 29656420805 is 50802465692.

It is a happy number.

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

It is not a de Polignac number, because 29656420805 - 2¹² = 29656416709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29656420805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269603771 + ... + 269603880.

It is an arithmetic number, because the mean of its divisors is an integer number (4852868868).

Almost surely, 2^29656420805 is an apocalyptic number.

It is an amenable number.

29656420805 is a deficient number, since it is larger than the sum of its proper divisors (9166530139).

29656420805 is a wasteful number, since it uses less digits than its factorization.

29656420805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539207667.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 29656420805 in words is "twenty-nine billion, six hundred fifty-six million, four hundred twenty thousand, eight hundred five".