5661551610 has 96 divisors (see below), whose sum is σ = 17293506048. Its totient is φ = 1266917760.

The previous prime is 5661551549. The next prime is 5661551611. The reversal of 5661551610 is 161551665.

It is not an unprimeable number, because it can be changed into a prime (5661551611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207082 + ... + 232821.

It is an arithmetic number, because the mean of its divisors is an integer number (180140688).

Almost surely, 2^5661551610 is an apocalyptic number.

5661551610 is an abundant number, since it is smaller than the sum of its proper divisors (11631954438).

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

5661551610 is a wasteful number, since it uses less digits than its factorization.

5661551610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439940 (or 439937 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5661551610 is about 75243.2828231198. The cubic root of 5661551610 is about 1782.2904917793.

Subtracting from 5661551610 its reverse (161551665), we obtain a palindrome (5499999945).

It can be divided in two parts, 566155 and 1610, that added together give a palindrome (567765).

The spelling of 5661551610 in words is "five billion, six hundred sixty-one million, five hundred fifty-one thousand, six hundred ten".