68181508037 has 16 divisors (see below), whose sum is σ = 72370372800. Its totient is φ = 64053400320.

The previous prime is 68181508027. The next prime is 68181508061. The reversal of 68181508037 is 73080518186.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 68181508037 - 2¹² = 68181503941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68181507982 and 68181508000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68181508027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3696923 + ... + 3715319.

It is an arithmetic number, because the mean of its divisors is an integer number (4523148300).

Almost surely, 2^68181508037 is an apocalyptic number.

It is an amenable number.

68181508037 is a deficient number, since it is larger than the sum of its proper divisors (4188864763).

68181508037 is a wasteful number, since it uses less digits than its factorization.

68181508037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20036.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 68181508037 in words is "sixty-eight billion, one hundred eighty-one million, five hundred eight thousand, thirty-seven".