72046660219 has 4 divisors (see below), whose sum is σ = 72050629896. Its totient is φ = 72042690544.

The previous prime is 72046660187. The next prime is 72046660241. The reversal of 72046660219 is 91206664027.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91206664027 = 52127 ⋅1749701.

It is a cyclic number.

It is not a de Polignac number, because 72046660219 - 2⁵ = 72046660187 is a prime.

It is a super-2 number, since 2×72046660219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72046660249) 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 3 ways as a sum of consecutive naturals, for example, 1957489 + ... + 1993954.

It is an arithmetic number, because the mean of its divisors is an integer number (18012657474).

Almost surely, 2^72046660219 is an apocalyptic number.

72046660219 is a deficient number, since it is larger than the sum of its proper divisors (3969677).

72046660219 is a wasteful number, since it uses less digits than its factorization.

72046660219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969676.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 72046660219 in words is "seventy-two billion, forty-six million, six hundred sixty thousand, two hundred nineteen".