1009195564541 has 4 divisors (see below), whose sum is σ = 1068560009532. Its totient is φ = 949831119552.

The previous prime is 1009195564477. The next prime is 1009195564577. The reversal of 1009195564541 is 1454655919001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 414182344900 + 595013219641 = 643570^2 + 771371^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009195564541 - 2⁶ = 1009195564477 is a prime.

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 1009195564541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009125564541) 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, 29682222470 + ... + 29682222503.

It is an arithmetic number, because the mean of its divisors is an integer number (267140002383).

Almost surely, 2^{1009195564541} is an apocalyptic number.

It is an amenable number.

1009195564541 is a deficient number, since it is larger than the sum of its proper divisors (59364444991).

1009195564541 is an equidigital number, since it uses as much as digits as its factorization.

1009195564541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59364444990.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 1009195564541 in words is "one trillion, nine billion, one hundred ninety-five million, five hundred sixty-four thousand, five hundred forty-one".