61673994631 has 2 divisors, whose sum is σ = 61673994632. Its totient is φ = 61673994630.

The previous prime is 61673994583. The next prime is 61673994671. The reversal of 61673994631 is 13649937616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61673994631 is a prime.

It is a super-2 number, since 2×61673994631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61673994671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30836997315 + 30836997316.

It is an arithmetic number, because the mean of its divisors is an integer number (30836997316).

Almost surely, 2^61673994631 is an apocalyptic number.

61673994631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61673994631 is an equidigital number, since it uses as much as digits as its factorization.

61673994631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 55.

The spelling of 61673994631 in words is "sixty-one billion, six hundred seventy-three million, nine hundred ninety-four thousand, six hundred thirty-one".