905633645 has 32 divisors (see below), whose sum is σ = 1278740736. Its totient is φ = 602726400.

The previous prime is 905633629. The next prime is 905633653. The reversal of 905633645 is 546336509.

It is not a de Polignac number, because 905633645 - 2⁴ = 905633629 is a prime.

It is a super-3 number, since 3×905633645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 829550 + ... + 830640.

It is an arithmetic number, because the mean of its divisors is an integer number (39960648).

Almost surely, 2^905633645 is an apocalyptic number.

It is an amenable number.

905633645 is a deficient number, since it is larger than the sum of its proper divisors (373107091).

905633645 is a wasteful number, since it uses less digits than its factorization.

905633645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781.

The product of its (nonzero) digits is 291600, while the sum is 41.

The square root of 905633645 is about 30093.7476064381. The cubic root of 905633645 is about 967.4997233517.

The spelling of 905633645 in words is "nine hundred five million, six hundred thirty-three thousand, six hundred forty-five".