105154999991 has 2 divisors, whose sum is σ = 105154999992. Its totient is φ = 105154999990.

The previous prime is 105154999979. The next prime is 105155000003. The reversal of 105154999991 is 199999451501.

It is a balanced prime because it is at equal distance from previous prime (105154999979) and next prime (105155000003).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105154999991 is a prime.

It is a super-2 number, since 2×105154999991² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105154999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52577499995 + 52577499996.

It is an arithmetic number, because the mean of its divisors is an integer number (52577499996).

Almost surely, 2^105154999991 is an apocalyptic number.

105154999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

105154999991 is an equidigital number, since it uses as much as digits as its factorization.

105154999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5904900, while the sum is 62.

The spelling of 105154999991 in words is "one hundred five billion, one hundred fifty-four million, nine hundred ninety-nine thousand, nine hundred ninety-one".