5631645000 has 80 divisors (see below), whose sum is σ = 17593305840. Its totient is φ = 1501768000.

The previous prime is 5631644987. The next prime is 5631645007. The reversal of 5631645000 is 5461365.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (5631645007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 172722 + ... + 202721.

It is an arithmetic number, because the mean of its divisors is an integer number (219916323).

Almost surely, 2^5631645000 is an apocalyptic number.

5631645000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5631645000 is an abundant number, since it is smaller than the sum of its proper divisors (11961660840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5631645000 is a wasteful number, since it uses less digits than its factorization.

5631645000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375472 (or 375453 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 5631645000 is about 75044.2869244555. The cubic root of 5631645000 is about 1779.1466894289.

The spelling of 5631645000 in words is "five billion, six hundred thirty-one million, six hundred forty-five thousand".