6404850745 has 4 divisors (see below), whose sum is σ = 7685820900. Its totient is φ = 5123880592.

The previous prime is 6404850719. The next prime is 6404850761. The reversal of 6404850745 is 5470584046.

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 1620223504 + 4784627241 = 40252^2 + 69171^2 .

It is a cyclic number.

It is not a de Polignac number, because 6404850745 - 2¹³ = 6404842553 is a prime.

It is a super-4 number, since 4×6404850745⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640485070 + ... + 640485079.

It is an arithmetic number, because the mean of its divisors is an integer number (1921455225).

Almost surely, 2^6404850745 is an apocalyptic number.

It is an amenable number.

6404850745 is a deficient number, since it is larger than the sum of its proper divisors (1280970155).

6404850745 is a wasteful number, since it uses less digits than its factorization.

6404850745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280970154.

The product of its (nonzero) digits is 537600, while the sum is 43.

The square root of 6404850745 is about 80030.3114138637. The cubic root of 6404850745 is about 1857.1044809018.

The spelling of 6404850745 in words is "six billion, four hundred four million, eight hundred fifty thousand, seven hundred forty-five".