29555444357381 has 2 divisors, whose sum is σ = 29555444357382. Its totient is φ = 29555444357380.

The previous prime is 29555444357363. The next prime is 29555444357423. The reversal of 29555444357381 is 18375344455592.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21143066189281 + 8412378168100 = 4598159^2 + 2900410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29555444357381 is a prime.

It is a super-2 number, since 2×29555444357381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29555444657381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14777722178690 + 14777722178691.

It is an arithmetic number, because the mean of its divisors is an integer number (14777722178691).

Almost surely, 2^{29555444357381} is an apocalyptic number.

It is an amenable number.

29555444357381 is a deficient number, since it is larger than the sum of its proper divisors (1).

29555444357381 is an equidigital number, since it uses as much as digits as its factorization.

29555444357381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880000, while the sum is 65.

The spelling of 29555444357381 in words is "twenty-nine trillion, five hundred fifty-five billion, four hundred forty-four million, three hundred fifty-seven thousand, three hundred eighty-one".