29640226561 has 8 divisors (see below), whose sum is σ = 32341585248. Its totient is φ = 26940000000.

The previous prime is 29640226543. The next prime is 29640226601. The reversal of 29640226561 is 16562204692.

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 29640226561 - 2²³ = 29631837953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29640226531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227815 + ... + 333436.

It is an arithmetic number, because the mean of its divisors is an integer number (4042698156).

Almost surely, 2^29640226561 is an apocalyptic number.

It is an amenable number.

29640226561 is a deficient number, since it is larger than the sum of its proper divisors (2701358687).

29640226561 is a wasteful number, since it uses less digits than its factorization.

29640226561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566063.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 29640226561 in words is "twenty-nine billion, six hundred forty million, two hundred twenty-six thousand, five hundred sixty-one".