29806897815 has 12 divisors (see below), whose sum is σ = 51665289624. Its totient is φ = 15897012144.

The previous prime is 29806897807. The next prime is 29806897819. The reversal of 29806897815 is 51879860892.

It is a happy number.

It is not a de Polignac number, because 29806897815 - 2³ = 29806897807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29806897819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331187709 + ... + 331187798.

It is an arithmetic number, because the mean of its divisors is an integer number (4305440802).

Almost surely, 2^29806897815 is an apocalyptic number.

29806897815 is a deficient number, since it is larger than the sum of its proper divisors (21858391809).

29806897815 is a wasteful number, since it uses less digits than its factorization.

29806897815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662375518 (or 662375515 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 63.

The spelling of 29806897815 in words is "twenty-nine billion, eight hundred six million, eight hundred ninety-seven thousand, eight hundred fifteen".