241651720557647 has 4 divisors (see below), whose sum is σ = 247271528012520. Its totient is φ = 236031913102776.

The previous prime is 241651720557619. The next prime is 241651720557679. The reversal of 241651720557647 is 746755027156142.

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

It is a cyclic number.

It is not a de Polignac number, because 241651720557647 - 2²⁸ = 241651452122191 is a prime.

It is a super-2 number, since 2×241651720557647² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 241651720557647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (241651720557607) 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, 2809903727372 + ... + 2809903727457.

It is an arithmetic number, because the mean of its divisors is an integer number (61817882003130).

Almost surely, 2^{241651720557647} is an apocalyptic number.

241651720557647 is a deficient number, since it is larger than the sum of its proper divisors (5619807454873).

241651720557647 is an equidigital number, since it uses as much as digits as its factorization.

241651720557647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619807454872.

The product of its (nonzero) digits is 98784000, while the sum is 62.

The spelling of 241651720557647 in words is "two hundred forty-one trillion, six hundred fifty-one billion, seven hundred twenty million, five hundred fifty-seven thousand, six hundred forty-seven".