29955205519891 has 2 divisors, whose sum is σ = 29955205519892. Its totient is φ = 29955205519890.

The previous prime is 29955205519807. The next prime is 29955205519979. The reversal of 29955205519891 is 19891550255992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29955205519891 - 2²³ = 29955197131283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29955205519891.

It is not a weakly prime, because it can be changed into another prime (29955205519091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14977602759945 + 14977602759946.

It is an arithmetic number, because the mean of its divisors is an integer number (14977602759946).

Almost surely, 2^{29955205519891} is an apocalyptic number.

29955205519891 is a deficient number, since it is larger than the sum of its proper divisors (1).

29955205519891 is an equidigital number, since it uses as much as digits as its factorization.

29955205519891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220000, while the sum is 70.

The spelling of 29955205519891 in words is "twenty-nine trillion, nine hundred fifty-five billion, two hundred five million, five hundred nineteen thousand, eight hundred ninety-one".