61478051329 has 2 divisors, whose sum is σ = 61478051330. Its totient is φ = 61478051328.

The previous prime is 61478051311. The next prime is 61478051333. The reversal of 61478051329 is 92315087416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36883970704 + 24594080625 = 192052^2 + 156825^2 .

It is a cyclic number.

It is not a de Polignac number, because 61478051329 - 2²⁷ = 61343833601 is a prime.

It is a super-2 number, since 2×61478051329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61478051339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30739025664 + 30739025665.

It is an arithmetic number, because the mean of its divisors is an integer number (30739025665).

It is a 1-persistent number, because it is pandigital, but 2⋅61478051329 = 122956102658 is not.

Almost surely, 2^61478051329 is an apocalyptic number.

It is an amenable number.

61478051329 is a deficient number, since it is larger than the sum of its proper divisors (1).

61478051329 is an equidigital number, since it uses as much as digits as its factorization.

61478051329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 61478051329 in words is "sixty-one billion, four hundred seventy-eight million, fifty-one thousand, three hundred twenty-nine".