61704031663 has 2 divisors, whose sum is σ = 61704031664. Its totient is φ = 61704031662.

The previous prime is 61704031643. The next prime is 61704031679. The reversal of 61704031663 is 36613040716.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61704031663 - 2¹⁷ = 61703900591 is a prime.

It is a super-3 number, since 3×61704031663³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61704031643) 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, 30852015831 + 30852015832.

It is an arithmetic number, because the mean of its divisors is an integer number (30852015832).

Almost surely, 2^61704031663 is an apocalyptic number.

61704031663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61704031663 is an equidigital number, since it uses as much as digits as its factorization.

61704031663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 61704031663 in words is "sixty-one billion, seven hundred four million, thirty-one thousand, six hundred sixty-three".