61671324529 has 2 divisors, whose sum is σ = 61671324530. Its totient is φ = 61671324528.

The previous prime is 61671324511. The next prime is 61671324557. The reversal of 61671324529 is 92542317616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61295856400 + 375468129 = 247580^2 + 19377^2 .

It is a cyclic number.

It is not a de Polignac number, because 61671324529 - 2¹⁹ = 61670800241 is a prime.

It is a super-2 number, since 2×61671324529² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61671324509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30835662264 + 30835662265.

It is an arithmetic number, because the mean of its divisors is an integer number (30835662265).

Almost surely, 2^61671324529 is an apocalyptic number.

It is an amenable number.

61671324529 is a deficient number, since it is larger than the sum of its proper divisors (1).

61671324529 is an equidigital number, since it uses as much as digits as its factorization.

61671324529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The spelling of 61671324529 in words is "sixty-one billion, six hundred seventy-one million, three hundred twenty-four thousand, five hundred twenty-nine".