3634520645 has 32 divisors (see below), whose sum is σ = 5158895616. Its totient is φ = 2406297600.

The previous prime is 3634520611. The next prime is 3634520647. The reversal of 3634520645 is 5460254363.

It is a happy number.

It is not a de Polignac number, because 3634520645 - 2²² = 3630326341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3634520599 and 3634520608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3634520647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126140 + ... + 152250.

It is an arithmetic number, because the mean of its divisors is an integer number (161215488).

Almost surely, 2^3634520645 is an apocalyptic number.

3634520645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3634520645 is a deficient number, since it is larger than the sum of its proper divisors (1524374971).

3634520645 is a wasteful number, since it uses less digits than its factorization.

3634520645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26261.

The product of its (nonzero) digits is 259200, while the sum is 38.

The square root of 3634520645 is about 60286.9857017250. The cubic root of 3634520645 is about 1537.5020849114.

The spelling of 3634520645 in words is "three billion, six hundred thirty-four million, five hundred twenty thousand, six hundred forty-five".