68840428908031 has 8 divisors (see below), whose sum is σ = 75102425845200. Its totient is φ = 62579061325440.

The previous prime is 68840428908011. The next prime is 68840428908061. The reversal of 68840428908031 is 13080982404886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68840428908031 - 2²¹ = 68840426810879 is a prime.

It is a super-2 number, since 2×68840428908031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68840428908011) 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, 157109916 + ... + 157547473.

It is an arithmetic number, because the mean of its divisors is an integer number (9387803230650).

Almost surely, 2^{68840428908031} is an apocalyptic number.

68840428908031 is a deficient number, since it is larger than the sum of its proper divisors (6261996937169).

68840428908031 is a wasteful number, since it uses less digits than its factorization.

68840428908031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314677289.

The product of its (nonzero) digits is 21233664, while the sum is 61.

The spelling of 68840428908031 in words is "sixty-eight trillion, eight hundred forty billion, four hundred twenty-eight million, nine hundred eight thousand, thirty-one".