402205040641 has 4 divisors (see below), whose sum is σ = 402217481812. Its totient is φ = 402192599472.

The previous prime is 402205040579. The next prime is 402205040647. The reversal of 402205040641 is 146040502204.

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 196851055041 + 205353985600 = 443679^2 + 453160^2 .

It is a cyclic number.

It is not a de Polignac number, because 402205040641 - 2⁷ = 402205040513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402205040647) 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, 6171966 + ... + 6236791.

It is an arithmetic number, because the mean of its divisors is an integer number (100554370453).

Almost surely, 2^402205040641 is an apocalyptic number.

It is an amenable number.

402205040641 is a deficient number, since it is larger than the sum of its proper divisors (12441171).

402205040641 is a wasteful number, since it uses less digits than its factorization.

402205040641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12441170.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 402205040641 its reverse (146040502204), we get a palindrome (548245542845).

The spelling of 402205040641 in words is "four hundred two billion, two hundred five million, forty thousand, six hundred forty-one".