30729161661691 has 2 divisors, whose sum is σ = 30729161661692. Its totient is φ = 30729161661690.

The previous prime is 30729161661631. The next prime is 30729161661707. The reversal of 30729161661691 is 19616616192703.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30729161661691 - 2¹⁵ = 30729161628923 is a prime.

It is not a weakly prime, because it can be changed into another prime (30729161661631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15364580830845 + 15364580830846.

It is an arithmetic number, because the mean of its divisors is an integer number (15364580830846).

Almost surely, 2^{30729161661691} is an apocalyptic number.

30729161661691 is a deficient number, since it is larger than the sum of its proper divisors (1).

30729161661691 is an equidigital number, since it uses as much as digits as its factorization.

30729161661691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The spelling of 30729161661691 in words is "thirty trillion, seven hundred twenty-nine billion, one hundred sixty-one million, six hundred sixty-one thousand, six hundred ninety-one".