61834981669 has 2 divisors, whose sum is σ = 61834981670. Its totient is φ = 61834981668.

The previous prime is 61834981667. The next prime is 61834981687. The reversal of 61834981669 is 96618943816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54516179169 + 7318802500 = 233487^2 + 85550^2 .

It is a cyclic number.

It is not a de Polignac number, because 61834981669 - 2¹ = 61834981667 is a prime.

It is a super-2 number, since 2×61834981669² (a number of 22 digits) contains 22 as substring.

Together with 61834981667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61834981667) 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, 30917490834 + 30917490835.

It is an arithmetic number, because the mean of its divisors is an integer number (30917490835).

Almost surely, 2^61834981669 is an apocalyptic number.

It is an amenable number.

61834981669 is a deficient number, since it is larger than the sum of its proper divisors (1).

61834981669 is an equidigital number, since it uses as much as digits as its factorization.

61834981669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13436928, while the sum is 61.

The spelling of 61834981669 in words is "sixty-one billion, eight hundred thirty-four million, nine hundred eighty-one thousand, six hundred sixty-nine".