68427640494 has 24 divisors (see below), whose sum is σ = 148526085240. Its totient is φ = 22768260048.

The previous prime is 68427640427. The next prime is 68427640499. The reversal of 68427640494 is 49404672486.

68427640494 is a `hidden beast` number, since 6 + 8 + 42 + 76 + 40 + 494 = 666.

It is a super-2 number, since 2×68427640494² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68427640494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68427640499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3402484 + ... + 3422535.

It is an arithmetic number, because the mean of its divisors is an integer number (6188586885).

Almost surely, 2^68427640494 is an apocalyptic number.

68427640494 is an abundant number, since it is smaller than the sum of its proper divisors (80098444746).

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

68427640494 is a wasteful number, since it uses less digits than its factorization.

68427640494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6825584 (or 6825581 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 68427640494 in words is "sixty-eight billion, four hundred twenty-seven million, six hundred forty thousand, four hundred ninety-four".