61450329481 has 2 divisors, whose sum is σ = 61450329482. Its totient is φ = 61450329480.

The previous prime is 61450329469. The next prime is 61450329497. The reversal of 61450329481 is 18492305416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56653520400 + 4796809081 = 238020^2 + 69259^2 .

It is a cyclic number.

It is not a de Polignac number, because 61450329481 - 2⁵ = 61450329449 is a prime.

It is a super-2 number, since 2×61450329481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61450329401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30725164740 + 30725164741.

It is an arithmetic number, because the mean of its divisors is an integer number (30725164741).

Almost surely, 2^61450329481 is an apocalyptic number.

It is an amenable number.

61450329481 is a deficient number, since it is larger than the sum of its proper divisors (1).

61450329481 is an equidigital number, since it uses as much as digits as its factorization.

61450329481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 61450329481 in words is "sixty-one billion, four hundred fifty million, three hundred twenty-nine thousand, four hundred eighty-one".