6401844453 has 16 divisors (see below), whose sum is σ = 8832257280. Its totient is φ = 4119734976.

The previous prime is 6401844443. The next prime is 6401844457. The reversal of 6401844453 is 3544481046.

It is not a de Polignac number, because 6401844453 - 2⁴ = 6401844437 is a prime.

It is a super-2 number, since 2×6401844453² = 81967224800813738418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401844457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571876 + ... + 582962.

It is an arithmetic number, because the mean of its divisors is an integer number (552016080).

Almost surely, 2^6401844453 is an apocalyptic number.

It is an amenable number.

6401844453 is a deficient number, since it is larger than the sum of its proper divisors (2430412827).

6401844453 is a wasteful number, since it uses less digits than its factorization.

6401844453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17756.

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 6401844453 is about 80011.5270008016. The cubic root of 6401844453 is about 1856.8138744898.

The spelling of 6401844453 in words is "six billion, four hundred one million, eight hundred forty-four thousand, four hundred fifty-three".