3643750645 has 8 divisors (see below), whose sum is σ = 4412616120. Its totient is φ = 2888256960.

The previous prime is 3643750619. The next prime is 3643750657. The reversal of 3643750645 is 5460573463.

It can be written as a sum of positive squares in 4 ways, for example, as 266048721 + 3377701924 = 16311^2 + 58118^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3643750645 - 2⁹ = 3643750133 is a prime.

It is a super-3 number, since 3×3643750645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3342346 + ... + 3343435.

It is an arithmetic number, because the mean of its divisors is an integer number (551577015).

Almost surely, 2^3643750645 is an apocalyptic number.

It is an amenable number.

3643750645 is a deficient number, since it is larger than the sum of its proper divisors (768865475).

3643750645 is a wasteful number, since it uses less digits than its factorization.

3643750645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685895.

The product of its (nonzero) digits is 907200, while the sum is 43.

The square root of 3643750645 is about 60363.4876808821. The cubic root of 3643750645 is about 1538.8024992410.

The spelling of 3643750645 in words is "three billion, six hundred forty-three million, seven hundred fifty thousand, six hundred forty-five".