29180946449 has 2 divisors, whose sum is σ = 29180946450. Its totient is φ = 29180946448.

The previous prime is 29180946427. The next prime is 29180946461. The reversal of 29180946449 is 94464908192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24465652225 + 4715294224 = 156415^2 + 68668^2 .

It is a cyclic number.

It is not a de Polignac number, because 29180946449 - 2¹² = 29180942353 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 29180946394 and 29180946403.

It is not a weakly prime, because it can be changed into another prime (29180946409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14590473224 + 14590473225.

It is an arithmetic number, because the mean of its divisors is an integer number (14590473225).

Almost surely, 2^29180946449 is an apocalyptic number.

It is an amenable number.

29180946449 is a deficient number, since it is larger than the sum of its proper divisors (1).

29180946449 is an equidigital number, since it uses as much as digits as its factorization.

29180946449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 29180946449 in words is "twenty-nine billion, one hundred eighty million, nine hundred forty-six thousand, four hundred forty-nine".