29905705553 has 2 divisors, whose sum is σ = 29905705554. Its totient is φ = 29905705552.

The previous prime is 29905705537. The next prime is 29905705561. The reversal of 29905705553 is 35550750992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24427189264 + 5478516289 = 156292^2 + 74017^2 .

It is a cyclic number.

It is not a de Polignac number, because 29905705553 - 2⁴ = 29905705537 is a prime.

It is not a weakly prime, because it can be changed into another prime (29905705513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14952852776 + 14952852777.

It is an arithmetic number, because the mean of its divisors is an integer number (14952852777).

Almost surely, 2^29905705553 is an apocalyptic number.

It is an amenable number.

29905705553 is a deficient number, since it is larger than the sum of its proper divisors (1).

29905705553 is an equidigital number, since it uses as much as digits as its factorization.

29905705553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2126250, while the sum is 50.

The spelling of 29905705553 in words is "twenty-nine billion, nine hundred five million, seven hundred five thousand, five hundred fifty-three".