68271914870251 has 4 divisors (see below), whose sum is σ = 68271976368232. Its totient is φ = 68271853372272.

The previous prime is 68271914870197. The next prime is 68271914870261. The reversal of 68271914870251 is 15207841917286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68271914870251 - 2¹³ = 68271914862059 is a prime.

It is a super-2 number, since 2×68271914870251² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68271914870251.

It is not an unprimeable number, because it can be changed into a prime (68271914870261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29052570 + ... + 31314463.

It is an arithmetic number, because the mean of its divisors is an integer number (17067994092058).

Almost surely, 2^{68271914870251} is an apocalyptic number.

68271914870251 is a deficient number, since it is larger than the sum of its proper divisors (61497981).

68271914870251 is a wasteful number, since it uses less digits than its factorization.

68271914870251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61497980.

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 68271914870251 in words is "sixty-eight trillion, two hundred seventy-one billion, nine hundred fourteen million, eight hundred seventy thousand, two hundred fifty-one".