61430733128 has 12 divisors (see below), whose sum is σ = 115183939065. Its totient is φ = 30715016048.

The previous prime is 61430733127. The next prime is 61430733151. The reversal of 61430733128 is 82133703416.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 41362610884 + 20068122244 = 203378^2 + 141662^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=175258.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61430733091 and 61430733100.

It is not an unprimeable number, because it can be changed into a prime (61430733121) 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 2 ways as a sum of consecutive naturals, for example, 657218 + ... + 744846.

Almost surely, 2^61430733128 is an apocalyptic number.

It is an amenable number.

61430733128 is a deficient number, since it is larger than the sum of its proper divisors (53753205937).

61430733128 is an frugal number, since it uses more digits than its factorization.

61430733128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175264 (or 87631 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 61430733128 in words is "sixty-one billion, four hundred thirty million, seven hundred thirty-three thousand, one hundred twenty-eight".