68553520519 has 4 divisors (see below), whose sum is σ = 74785658760. Its totient is φ = 62321382280.

The previous prime is 68553520501. The next prime is 68553520537. The reversal of 68553520519 is 91502535586.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68553520501) and next prime (68553520537).

It is a cyclic number.

It is not a de Polignac number, because 68553520519 - 2¹³ = 68553512327 is a prime.

It is a super-2 number, since 2×68553520519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68553520319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116069104 + ... + 3116069125.

It is an arithmetic number, because the mean of its divisors is an integer number (18696414690).

Almost surely, 2^68553520519 is an apocalyptic number.

68553520519 is a deficient number, since it is larger than the sum of its proper divisors (6232138241).

68553520519 is a wasteful number, since it uses less digits than its factorization.

68553520519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232138240.

The product of its (nonzero) digits is 1620000, while the sum is 49.

The spelling of 68553520519 in words is "sixty-eight billion, five hundred fifty-three million, five hundred twenty thousand, five hundred nineteen".