67869561497 has 4 divisors (see below), whose sum is σ = 68569247796. Its totient is φ = 67169875200.

The previous prime is 67869561451. The next prime is 67869561521. The reversal of 67869561497 is 79416596876.

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 46488103321 + 21381458176 = 215611^2 + 146224^2 .

It is a cyclic number.

It is not a de Polignac number, because 67869561497 - 2⁶ = 67869561433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67869561197) 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, 349843004 + ... + 349843197.

It is an arithmetic number, because the mean of its divisors is an integer number (17142311949).

Almost surely, 2^67869561497 is an apocalyptic number.

It is an amenable number.

67869561497 is a deficient number, since it is larger than the sum of its proper divisors (699686299).

67869561497 is an equidigital number, since it uses as much as digits as its factorization.

67869561497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699686298.

The product of its digits is 137168640, while the sum is 68.

The spelling of 67869561497 in words is "sixty-seven billion, eight hundred sixty-nine million, five hundred sixty-one thousand, four hundred ninety-seven".