909645963641 has 4 divisors (see below), whose sum is σ = 909649785972. Its totient is φ = 909642141312.

The previous prime is 909645963637. The next prime is 909645963659. The reversal of 909645963641 is 146369546909.

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 623185515241 + 286460448400 = 789421^2 + 535220^2 .

It is a cyclic number.

It is not a de Polignac number, because 909645963641 - 2² = 909645963637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (909645963041) 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, 1528676 + ... + 2038661.

It is an arithmetic number, because the mean of its divisors is an integer number (227412446493).

Almost surely, 2^909645963641 is an apocalyptic number.

It is an amenable number.

909645963641 is a deficient number, since it is larger than the sum of its proper divisors (3822331).

909645963641 is a wasteful number, since it uses less digits than its factorization.

909645963641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822330.

The product of its (nonzero) digits is 37791360, while the sum is 62.

The spelling of 909645963641 in words is "nine hundred nine billion, six hundred forty-five million, nine hundred sixty-three thousand, six hundred forty-one".