68210121628 has 24 divisors (see below), whose sum is σ = 130946820480. Its totient is φ = 30831387120.

The previous prime is 68210121589. The next prime is 68210121643. The reversal of 68210121628 is 82612101286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322376 + ... + 4338127.

It is an arithmetic number, because the mean of its divisors is an integer number (5456117520).

Almost surely, 2^68210121628 is an apocalyptic number.

It is an amenable number.

68210121628 is a deficient number, since it is larger than the sum of its proper divisors (62736698852).

68210121628 is a wasteful number, since it uses less digits than its factorization.

68210121628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8660697 (or 8660695 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The spelling of 68210121628 in words is "sixty-eight billion, two hundred ten million, one hundred twenty-one thousand, six hundred twenty-eight".