72700256017 has 4 divisors (see below), whose sum is σ = 73576162800. Its totient is φ = 71824349236.

The previous prime is 72700256003. The next prime is 72700256021. The reversal of 72700256017 is 71065200727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71065200727 = 29 ⋅2450524163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72700256017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72700256117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437953267 + ... + 437953432.

It is an arithmetic number, because the mean of its divisors is an integer number (18394040700).

Almost surely, 2^72700256017 is an apocalyptic number.

It is an amenable number.

72700256017 is a deficient number, since it is larger than the sum of its proper divisors (875906783).

72700256017 is an equidigital number, since it uses as much as digits as its factorization.

72700256017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875906782.

The product of its (nonzero) digits is 41160, while the sum is 37.

The spelling of 72700256017 in words is "seventy-two billion, seven hundred million, two hundred fifty-six thousand, seventeen".