29997928979271 has 48 divisors (see below), whose sum is σ = 47306457589248. Its totient is φ = 18166339699200.

The previous prime is 29997928979237. The next prime is 29997928979273. The reversal of 29997928979271 is 17297982979992.

29997928979271 is a `hidden beast` number, since 2 + 99 + 97 + 9 + 289 + 7 + 92 + 71 = 666.

It is not a de Polignac number, because 29997928979271 - 2¹¹ = 29997928977223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997928979273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 842218455 + ... + 842254071.

It is an arithmetic number, because the mean of its divisors is an integer number (985551199776).

Almost surely, 2^{29997928979271} is an apocalyptic number.

29997928979271 is a deficient number, since it is larger than the sum of its proper divisors (17308528609977).

29997928979271 is a wasteful number, since it uses less digits than its factorization.

29997928979271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42052 (or 42049 counting only the distinct ones).

The product of its digits is 11666192832, while the sum is 90.

The spelling of 29997928979271 in words is "twenty-nine trillion, nine hundred ninety-seven billion, nine hundred twenty-eight million, nine hundred seventy-nine thousand, two hundred seventy-one".