5581645730 has 24 divisors (see below), whose sum is σ = 10325866068. Its totient is φ = 2172310848.

The previous prime is 5581645723. The next prime is 5581645753. The reversal of 5581645730 is 375461855.

It can be written as a sum of positive squares in 6 ways, for example, as 2774023561 + 2807622169 = 52669^2 + 52987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190169 + ... + 217548.

Almost surely, 2^5581645730 is an apocalyptic number.

5581645730 is a deficient number, since it is larger than the sum of its proper divisors (4744220338).

5581645730 is a wasteful number, since it uses less digits than its factorization.

5581645730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407798 (or 407761 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The square root of 5581645730 is about 74710.4124603793. The cubic root of 5581645730 is about 1773.8657812446.

The spelling of 5581645730 in words is "five billion, five hundred eighty-one million, six hundred forty-five thousand, seven hundred thirty".