641167761147 has 8 divisors (see below), whose sum is σ = 884369325840. Its totient is φ = 412705685280.

The previous prime is 641167761139. The next prime is 641167761149. The reversal of 641167761147 is 741167761146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641167761147 - 2³ = 641167761139 is a prime.

It is a super-2 number, since 2×641167761147² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641167761147.

It is not an unprimeable number, because it can be changed into a prime (641167761149) 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, 3684872104 + ... + 3684872277.

It is an arithmetic number, because the mean of its divisors is an integer number (110546165730).

Almost surely, 2^641167761147 is an apocalyptic number.

641167761147 is a deficient number, since it is larger than the sum of its proper divisors (243201564693).

641167761147 is a wasteful number, since it uses less digits than its factorization.

641167761147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7369744413.

The product of its digits is 1185408, while the sum is 51.

Subtracting 641167761147 from its reverse (741167761146), we obtain a palindrome (99999999999).

The spelling of 641167761147 in words is "six hundred forty-one billion, one hundred sixty-seven million, seven hundred sixty-one thousand, one hundred forty-seven".