72069771461 has 8 divisors (see below), whose sum is σ = 72254166264. Its totient is φ = 71885613760.

The previous prime is 72069771451. The next prime is 72069771463. The reversal of 72069771461 is 16417796027.

It can be written as a sum of positive squares in 4 ways, for example, as 1993622500 + 70076148961 = 44650^2 + 264719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72069771461 - 2¹⁴ = 72069755077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72069771463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557591 + ... + 674571.

It is an arithmetic number, because the mean of its divisors is an integer number (9031770783).

Almost surely, 2^72069771461 is an apocalyptic number.

It is an amenable number.

72069771461 is a deficient number, since it is larger than the sum of its proper divisors (184394803).

72069771461 is a wasteful number, since it uses less digits than its factorization.

72069771461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118551.

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 72069771461 in words is "seventy-two billion, sixty-nine million, seven hundred seventy-one thousand, four hundred sixty-one".