61886159999 has 2 divisors, whose sum is σ = 61886160000. Its totient is φ = 61886159998.

The previous prime is 61886159983. The next prime is 61886160043. The reversal of 61886159999 is 99995168816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61886159999 - 2⁴ = 61886159983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61886149999) 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, 30943079999 + 30943080000.

It is an arithmetic number, because the mean of its divisors is an integer number (30943080000).

Almost surely, 2^61886159999 is an apocalyptic number.

61886159999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61886159999 is an equidigital number, since it uses as much as digits as its factorization.

61886159999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75582720, while the sum is 71.

The spelling of 61886159999 in words is "sixty-one billion, eight hundred eighty-six million, one hundred fifty-nine thousand, nine hundred ninety-nine".