67195581401 has 4 divisors (see below), whose sum is σ = 72364472292. Its totient is φ = 62026690512.

The previous prime is 67195581389. The next prime is 67195581407. The reversal of 67195581401 is 10418559176.

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 46192325776 + 21003255625 = 214924^2 + 144925^2 .

It is a cyclic number.

It is not a de Polignac number, because 67195581401 - 2⁶ = 67195581337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67195581407) 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, 2584445426 + ... + 2584445451.

It is an arithmetic number, because the mean of its divisors is an integer number (18091118073).

Almost surely, 2^67195581401 is an apocalyptic number.

It is an amenable number.

67195581401 is a deficient number, since it is larger than the sum of its proper divisors (5168890891).

67195581401 is a wasteful number, since it uses less digits than its factorization.

67195581401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168890890.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 67195581401 in words is "sixty-seven billion, one hundred ninety-five million, five hundred eighty-one thousand, four hundred one".