68447767503 has 4 divisors (see below), whose sum is σ = 91263690008. Its totient is φ = 45631845000.

The previous prime is 68447767499. The next prime is 68447767511. The reversal of 68447767503 is 30576774486.

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

It is not a de Polignac number, because 68447767503 - 2² = 68447767499 is a prime.

It is a super-2 number, since 2×68447767503² (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 (68447767543) 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, 11407961248 + ... + 11407961253.

It is an arithmetic number, because the mean of its divisors is an integer number (22815922502).

Almost surely, 2^68447767503 is an apocalyptic number.

68447767503 is a deficient number, since it is larger than the sum of its proper divisors (22815922505).

68447767503 is a wasteful number, since it uses less digits than its factorization.

68447767503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22815922504.

The product of its (nonzero) digits is 23708160, while the sum is 57.

The spelling of 68447767503 in words is "sixty-eight billion, four hundred forty-seven million, seven hundred sixty-seven thousand, five hundred three".