29505318061 has 2 divisors, whose sum is σ = 29505318062. Its totient is φ = 29505318060.

The previous prime is 29505318001. The next prime is 29505318071. The reversal of 29505318061 is 16081350592.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15408505161 + 14096812900 = 124131^2 + 118730^2 .

It is a cyclic number.

It is not a de Polignac number, because 29505318061 - 2²³ = 29496929453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29505318001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14752659030 + 14752659031.

It is an arithmetic number, because the mean of its divisors is an integer number (14752659031).

Almost surely, 2^29505318061 is an apocalyptic number.

It is an amenable number.

29505318061 is a deficient number, since it is larger than the sum of its proper divisors (1).

29505318061 is an equidigital number, since it uses as much as digits as its factorization.

29505318061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

It can be divided in two parts, 2950531 and 8061, that added together give a palindrome (2958592).

The spelling of 29505318061 in words is "twenty-nine billion, five hundred five million, three hundred eighteen thousand, sixty-one".