72186259079 has 4 divisors (see below), whose sum is σ = 78748646280. Its totient is φ = 65623871880.

The previous prime is 72186259037. The next prime is 72186259081. The reversal of 72186259079 is 97095268127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72186259079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72186259009) 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, 3281193584 + ... + 3281193605.

It is an arithmetic number, because the mean of its divisors is an integer number (19687161570).

Almost surely, 2^72186259079 is an apocalyptic number.

72186259079 is a deficient number, since it is larger than the sum of its proper divisors (6562387201).

72186259079 is a wasteful number, since it uses less digits than its factorization.

72186259079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6562387200.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 72186259079 in words is "seventy-two billion, one hundred eighty-six million, two hundred fifty-nine thousand, seventy-nine".