68515623 has 24 divisors (see below), whose sum is σ = 108235920. Its totient is φ = 41420160.

The previous prime is 68515621. The next prime is 68515679. The reversal of 68515623 is 32651586.

It is not a de Polignac number, because 68515623 - 2¹ = 68515621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68515621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60123 + ... + 61251.

It is an arithmetic number, because the mean of its divisors is an integer number (4509830).

Almost surely, 2^68515623 is an apocalyptic number.

68515623 is a deficient number, since it is larger than the sum of its proper divisors (39720297).

68515623 is a wasteful number, since it uses less digits than its factorization.

68515623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759 (or 1756 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 68515623 is about 8277.4164447610. The cubic root of 68515623 is about 409.1945778615.

The spelling of 68515623 in words is "sixty-eight million, five hundred fifteen thousand, six hundred twenty-three".