68449066542 has 12 divisors (see below), whose sum is σ = 148306310880. Its totient is φ = 22816355508.

The previous prime is 68449066541. The next prime is 68449066561. The reversal of 68449066542 is 24566094486.

68449066542 is a `hidden beast` number, since 6 + 8 + 4 + 4 + 90 + 6 + 6 + 542 = 666.

It is a super-2 number, since 2×68449066542² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68449066541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1901362942 + ... + 1901362977.

It is an arithmetic number, because the mean of its divisors is an integer number (12358859240).

Almost surely, 2^68449066542 is an apocalyptic number.

68449066542 is an abundant number, since it is smaller than the sum of its proper divisors (79857244338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68449066542 is a wasteful number, since it uses less digits than its factorization.

68449066542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3802725927 (or 3802725924 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 68449066542 in words is "sixty-eight billion, four hundred forty-nine million, sixty-six thousand, five hundred forty-two".