68711775451 has 4 divisors (see below), whose sum is σ = 74958300504. Its totient is φ = 62465250400.

The previous prime is 68711775437. The next prime is 68711775491. The reversal of 68711775451 is 15457711786.

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 68711775451 - 2²¹ = 68709678299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68711775421) 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, 3123262510 + ... + 3123262531.

It is an arithmetic number, because the mean of its divisors is an integer number (18739575126).

Almost surely, 2^68711775451 is an apocalyptic number.

68711775451 is a deficient number, since it is larger than the sum of its proper divisors (6246525053).

68711775451 is a wasteful number, since it uses less digits than its factorization.

68711775451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246525052.

The product of its digits is 1646400, while the sum is 52.

The spelling of 68711775451 in words is "sixty-eight billion, seven hundred eleven million, seven hundred seventy-five thousand, four hundred fifty-one".