68545540607 has 16 divisors (see below), whose sum is σ = 70302202752. Its totient is φ = 66811741920.

The previous prime is 68545540597. The next prime is 68545540633. The reversal of 68545540607 is 70604554586.

It is a cyclic number.

It is not a de Polignac number, because 68545540607 - 2⁶ = 68545540543 is a prime.

It is a super-2 number, since 2×68545540607² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68545540507) 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, 3440288 + ... + 3460154.

It is an arithmetic number, because the mean of its divisors is an integer number (4393887672).

Almost surely, 2^68545540607 is an apocalyptic number.

68545540607 is a deficient number, since it is larger than the sum of its proper divisors (1756662145).

68545540607 is a wasteful number, since it uses less digits than its factorization.

68545540607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20438.

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 68545540607 in words is "sixty-eight billion, five hundred forty-five million, five hundred forty thousand, six hundred seven".