72682003217 has 4 divisors (see below), whose sum is σ = 75188279220. Its totient is φ = 70175727216.

The previous prime is 72682003193. The next prime is 72682003237. The reversal of 72682003217 is 71230028627.

It is a Cunningham number, because it is equal to 269596²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71230028627 = 7867 ⋅9054281.

It can be written as a sum of positive squares in 2 ways, for example, as 38112410176 + 34569593041 = 195224^2 + 185929^2 .

It is a cyclic number.

It is not a de Polignac number, because 72682003217 - 2²⁶ = 72614894353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72682003237) 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, 1253137958 + ... + 1253138015.

It is an arithmetic number, because the mean of its divisors is an integer number (18797069805).

Almost surely, 2^72682003217 is an apocalyptic number.

It is an amenable number.

72682003217 is a deficient number, since it is larger than the sum of its proper divisors (2506276003).

72682003217 is a wasteful number, since it uses less digits than its factorization.

72682003217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506276002.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 72682003217 in words is "seventy-two billion, six hundred eighty-two million, three thousand, two hundred seventeen".