61868458999 has 2 divisors, whose sum is σ = 61868459000. Its totient is φ = 61868458998.

The previous prime is 61868458997. The next prime is 61868459017. The reversal of 61868458999 is 99985486816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61868458999 - 2¹ = 61868458997 is a prime.

Together with 61868458997, 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 (61868458997) 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, 30934229499 + 30934229500.

It is an arithmetic number, because the mean of its divisors is an integer number (30934229500).

Almost surely, 2^61868458999 is an apocalyptic number.

61868458999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61868458999 is an equidigital number, since it uses as much as digits as its factorization.

61868458999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268738560, while the sum is 73.

The spelling of 61868458999 in words is "sixty-one billion, eight hundred sixty-eight million, four hundred fifty-eight thousand, nine hundred ninety-nine".