67361561129 has 4 divisors (see below), whose sum is σ = 67363864260. Its totient is φ = 67359258000.

The previous prime is 67361561123. The next prime is 67361561147. The reversal of 67361561129 is 92116516376.

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 55507360000 + 11854201129 = 235600^2 + 108877^2 .

It is a cyclic number.

It is not a de Polignac number, because 67361561129 - 2²⁰ = 67360512553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67361561123) 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, 1107122 + ... + 1166379.

It is an arithmetic number, because the mean of its divisors is an integer number (16840966065).

Almost surely, 2^67361561129 is an apocalyptic number.

It is an amenable number.

67361561129 is a deficient number, since it is larger than the sum of its proper divisors (2303131).

67361561129 is a wasteful number, since it uses less digits than its factorization.

67361561129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303130.

The product of its digits is 408240, while the sum is 47.

The spelling of 67361561129 in words is "sixty-seven billion, three hundred sixty-one million, five hundred sixty-one thousand, one hundred twenty-nine".