68531617415 has 8 divisors (see below), whose sum is σ = 82992418080. Its totient is φ = 54322309152.

The previous prime is 68531617381. The next prime is 68531617459. The reversal of 68531617415 is 51471613586.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68531617415 - 2⁸ = 68531617159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68531617415.

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, 62872499 + ... + 62873588.

It is an arithmetic number, because the mean of its divisors is an integer number (10374052260).

Almost surely, 2^68531617415 is an apocalyptic number.

68531617415 is a deficient number, since it is larger than the sum of its proper divisors (14460800665).

68531617415 is a wasteful number, since it uses less digits than its factorization.

68531617415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125746201.

The product of its digits is 604800, while the sum is 47.

The spelling of 68531617415 in words is "sixty-eight billion, five hundred thirty-one million, six hundred seventeen thousand, four hundred fifteen".