68736518 has 4 divisors (see below), whose sum is σ = 103104780. Its totient is φ = 34368258.

The previous prime is 68736511. The next prime is 68736523. The reversal of 68736518 is 81563786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81563786 = 2 ⋅40781893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68736511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17184128 + ... + 17184131.

It is an arithmetic number, because the mean of its divisors is an integer number (25776195).

Almost surely, 2^68736518 is an apocalyptic number.

68736518 is a deficient number, since it is larger than the sum of its proper divisors (34368262).

68736518 is a wasteful number, since it uses less digits than its factorization.

68736518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34368261.

The product of its digits is 241920, while the sum is 44.

The square root of 68736518 is about 8290.7489408376. The cubic root of 68736518 is about 409.6338551512.

The spelling of 68736518 in words is "sixty-eight million, seven hundred thirty-six thousand, five hundred eighteen".