68719477097 has 4 divisors (see below), whose sum is σ = 68722273620. Its totient is φ = 68716680576.

The previous prime is 68719477061. The next prime is 68719477181. The reversal of 68719477097 is 79077491786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67130737216 + 1588739881 = 259096^2 + 39859^2 .

It is a cyclic number.

It is not a de Polignac number, because 68719477097 - 2¹⁶ = 68719411561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68719470097) 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, 1361072 + ... + 1410657.

It is an arithmetic number, because the mean of its divisors is an integer number (17180568405).

Almost surely, 2^68719477097 is an apocalyptic number.

It is an amenable number.

68719477097 is a deficient number, since it is larger than the sum of its proper divisors (2796523).

68719477097 is a wasteful number, since it uses less digits than its factorization.

68719477097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796522.

The product of its (nonzero) digits is 37340352, while the sum is 65.

The spelling of 68719477097 in words is "sixty-eight billion, seven hundred nineteen million, four hundred seventy-seven thousand, ninety-seven".