68640122074 has 16 divisors (see below), whose sum is σ = 103591014912. Its totient is φ = 34110287568.

The previous prime is 68640122071. The next prime is 68640122081. The reversal of 68640122074 is 47022104686.

It is a happy number.

It is a super-2 number, since 2×68640122074² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68640122071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147867 + ... + 398929.

It is an arithmetic number, because the mean of its divisors is an integer number (6474438432).

Almost surely, 2^68640122074 is an apocalyptic number.

68640122074 is a deficient number, since it is larger than the sum of its proper divisors (34950892838).

68640122074 is a wasteful number, since it uses less digits than its factorization.

68640122074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251901.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 68640122074 in words is "sixty-eight billion, six hundred forty million, one hundred twenty-two thousand, seventy-four".