265721270417 has 8 divisors (see below), whose sum is σ = 266577732960. Its totient is φ = 264865867200.

The previous prime is 265721270411. The next prime is 265721270443. The reversal of 265721270417 is 714072127562.

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 265721270417 - 2⁴ = 265721270401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265721270411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239198 + ... + 767240.

It is an arithmetic number, because the mean of its divisors is an integer number (33322216620).

Almost surely, 2^265721270417 is an apocalyptic number.

It is an amenable number.

265721270417 is a deficient number, since it is larger than the sum of its proper divisors (856462543).

265721270417 is a wasteful number, since it uses less digits than its factorization.

265721270417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529663.

The product of its (nonzero) digits is 329280, while the sum is 44.

Adding to 265721270417 its reverse (714072127562), we get a palindrome (979793397979).

The spelling of 265721270417 in words is "two hundred sixty-five billion, seven hundred twenty-one million, two hundred seventy thousand, four hundred seventeen".