5661647500 has 120 divisors (see below), whose sum is σ = 12866956256. Its totient is φ = 2177280000.

The previous prime is 5661647449. The next prime is 5661647533. The reversal of 5661647500 is 57461665.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8972185 + ... + 8972815.

Almost surely, 2^5661647500 is an apocalyptic number.

5661647500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661647500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6433478128).

5661647500 is an abundant number, since it is smaller than the sum of its proper divisors (7205308756).

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

5661647500 is a wasteful number, since it uses less digits than its factorization.

5661647500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 5661647500 is about 75243.9200201584. The cubic root of 5661647500 is about 1782.3005539720.

The spelling of 5661647500 in words is "five billion, six hundred sixty-one million, six hundred forty-seven thousand, five hundred".