68142444815 has 8 divisors (see below), whose sum is σ = 81774380688. Its totient is φ = 54511657920.

The previous prime is 68142444791. The next prime is 68142444823. The reversal of 68142444815 is 51844424186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68142444815 - 2¹⁰ = 68142443791 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 68142444815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150881 + ... + 398810.

It is an arithmetic number, because the mean of its divisors is an integer number (10221797586).

Almost surely, 2^68142444815 is an apocalyptic number.

68142444815 is a deficient number, since it is larger than the sum of its proper divisors (13631935873).

68142444815 is a wasteful number, since it uses less digits than its factorization.

68142444815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574489.

The product of its digits is 983040, while the sum is 47.

The spelling of 68142444815 in words is "sixty-eight billion, one hundred forty-two million, four hundred forty-four thousand, eight hundred fifteen".