68298547905 has 96 divisors (see below), whose sum is σ = 136071936000. Its totient is φ = 31043782656.

The previous prime is 68298547903. The next prime is 68298547949. The reversal of 68298547905 is 50974589286.

68298547905 is a `hidden beast` number, since 6 + 82 + 9 + 8 + 547 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 68298547905 - 2¹ = 68298547903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (68298547903) 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 in 95 ways as a sum of consecutive naturals, for example, 52658217 + ... + 52659513.

It is an arithmetic number, because the mean of its divisors is an integer number (1417416000).

Almost surely, 2^68298547905 is an apocalyptic number.

68298547905 is the 150885-th octagonal number.

It is an amenable number.

68298547905 is a deficient number, since it is larger than the sum of its proper divisors (67773388095).

68298547905 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (68298547904) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (2140).

68298547905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 68298547905 in words is "sixty-eight billion, two hundred ninety-eight million, five hundred forty-seven thousand, nine hundred five".