68900450287705 has 12 divisors (see below), whose sum is σ = 84746324230956. Its totient is φ = 53775961193600.

The previous prime is 68900450287703. The next prime is 68900450287793. The reversal of 68900450287705 is 50778205400986.

It can be written as a sum of positive squares in 6 ways, for example, as 4466886477001 + 64433563810704 = 2113501^2 + 8027052^2 .

It is not a de Polignac number, because 68900450287705 - 2¹ = 68900450287703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68900450287703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4098769126 + ... + 4098785935.

It is an arithmetic number, because the mean of its divisors is an integer number (7062193685913).

Almost surely, 2^{68900450287705} is an apocalyptic number.

It is an amenable number.

68900450287705 is a deficient number, since it is larger than the sum of its proper divisors (15845873943251).

68900450287705 is an equidigital number, since it uses as much as digits as its factorization.

68900450287705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8197555148 (or 8197555107 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 68900450287705 in words is "sixty-eight trillion, nine hundred billion, four hundred fifty million, two hundred eighty-seven thousand, seven hundred five".