30729443461 has 4 divisors (see below), whose sum is σ = 31478942124. Its totient is φ = 29979944800.

The previous prime is 30729443447. The next prime is 30729443467. The reversal of 30729443461 is 16434492703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15379720225 + 15349723236 = 124015^2 + 123894^2 .

It is a cyclic number.

It is not a de Polignac number, because 30729443461 - 2⁵ = 30729443429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30729443467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374749270 + ... + 374749351.

It is an arithmetic number, because the mean of its divisors is an integer number (7869735531).

Almost surely, 2^30729443461 is an apocalyptic number.

It is an amenable number.

30729443461 is a deficient number, since it is larger than the sum of its proper divisors (749498663).

30729443461 is an equidigital number, since it uses as much as digits as its factorization.

30729443461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749498662.

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 30729443461 in words is "thirty billion, seven hundred twenty-nine million, four hundred forty-three thousand, four hundred sixty-one".