68520406684 has 12 divisors (see below), whose sum is σ = 121553324704. Its totient is φ = 33790885344.

The previous prime is 68520406673. The next prime is 68520406687. The reversal of 68520406684 is 48660402586.

It is a super-2 number, since 2×68520406684² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68520406687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117329172 + ... + 117329755.

Almost surely, 2^68520406684 is an apocalyptic number.

It is an amenable number.

68520406684 is a deficient number, since it is larger than the sum of its proper divisors (53032918020).

68520406684 is a wasteful number, since it uses less digits than its factorization.

68520406684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234659004 (or 234659002 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 49.

The spelling of 68520406684 in words is "sixty-eight billion, five hundred twenty million, four hundred six thousand, six hundred eighty-four".