2145263064641 has 4 divisors (see below), whose sum is σ = 2185739726292. Its totient is φ = 2104786402992.

The previous prime is 2145263064583. The next prime is 2145263064647. The reversal of 2145263064641 is 1464603625412.

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 1955323992241 + 189939072400 = 1398329^2 + 435820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145263064641 - 2³⁴ = 2128083195457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145263064592 and 2145263064601.

It is not an unprimeable number, because it can be changed into a prime (2145263064647) 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, 20238330746 + ... + 20238330851.

It is an arithmetic number, because the mean of its divisors is an integer number (546434931573).

Almost surely, 2^{2145263064641} is an apocalyptic number.

It is an amenable number.

2145263064641 is a deficient number, since it is larger than the sum of its proper divisors (40476661651).

2145263064641 is an equidigital number, since it uses as much as digits as its factorization.

2145263064641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40476661650.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 2145263064641 in words is "two trillion, one hundred forty-five billion, two hundred sixty-three million, sixty-four thousand, six hundred forty-one".