68455782987601 has 3 divisors (see below), whose sum is σ = 68455791261403. Its totient is φ = 68455774713800.

The previous prime is 68455782987589. The next prime is 68455782987743. The reversal of 68455782987601 is 10678928755486.

The square root of 68455782987601 is 8273801.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 62635337234001 + 5820445753600 = 7914249^2 + 2412560^2 .

It is not a de Polignac number, because 68455782987601 - 2¹⁷ = 68455782856529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68455782984601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4136901 + ... + 12410701.

Almost surely, 2^{68455782987601} is an apocalyptic number.

68455782987601 is the 8273801-st square number.

68455782987601 is the 4136901-st centered octagonal number.

It is an amenable number.

68455782987601 is a deficient number, since it is larger than the sum of its proper divisors (8273802).

68455782987601 is an frugal number, since it uses more digits than its factorization.

68455782987601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16547602 (or 8273801 counting only the distinct ones).

The product of its (nonzero) digits is 1625702400, while the sum is 76.

The spelling of 68455782987601 in words is "sixty-eight trillion, four hundred fifty-five billion, seven hundred eighty-two million, nine hundred eighty-seven thousand, six hundred one".