641105514091 has 8 divisors (see below), whose sum is σ = 748281208320. Its totient is φ = 537827117928.

The previous prime is 641105514073. The next prime is 641105514151. The reversal of 641105514091 is 190415501146.

It is a happy number.

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 641105514091 - 2¹³ = 641105505899 is a prime.

It is a super-2 number, since 2×641105514091² (a number of 24 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 641105514091.

It is not an unprimeable number, because it can be changed into a prime (641105514001) 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, 974324161 + ... + 974324818.

It is an arithmetic number, because the mean of its divisors is an integer number (93535151040).

Almost surely, 2^641105514091 is an apocalyptic number.

641105514091 is a deficient number, since it is larger than the sum of its proper divisors (107175694229).

641105514091 is a wasteful number, since it uses less digits than its factorization.

641105514091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948649033.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 641105514091 in words is "six hundred forty-one billion, one hundred five million, five hundred fourteen thousand, ninety-one".