68602917553 has 4 divisors (see below), whose sum is σ = 68603674608. Its totient is φ = 68602160500.

The previous prime is 68602917533. The next prime is 68602917577. The reversal of 68602917553 is 35571920686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68602917553 - 2²¹ = 68600820401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68602917553.

It is not an unprimeable number, because it can be changed into a prime (68602917533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220651 + ... + 431152.

It is an arithmetic number, because the mean of its divisors is an integer number (17150918652).

Almost surely, 2^68602917553 is an apocalyptic number.

It is an amenable number.

68602917553 is a deficient number, since it is larger than the sum of its proper divisors (757055).

68602917553 is a wasteful number, since it uses less digits than its factorization.

68602917553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757054.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 68602917553 in words is "sixty-eight billion, six hundred two million, nine hundred seventeen thousand, five hundred fifty-three".