29870992561 has 8 divisors (see below), whose sum is σ = 31194132480. Its totient is φ = 28549886112.

The previous prime is 29870992471. The next prime is 29870992579. The reversal of 29870992561 is 16529907892.

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 29870992561 - 2¹³ = 29870984369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29870992496 and 29870992505.

It is not an unprimeable number, because it can be changed into a prime (29870992661) 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, 478300 + ... + 537133.

It is an arithmetic number, because the mean of its divisors is an integer number (3899266560).

Almost surely, 2^29870992561 is an apocalyptic number.

It is an amenable number.

29870992561 is a deficient number, since it is larger than the sum of its proper divisors (1323139919).

29870992561 is a wasteful number, since it uses less digits than its factorization.

29870992561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016735.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 29870992561 in words is "twenty-nine billion, eight hundred seventy million, nine hundred ninety-two thousand, five hundred sixty-one".