5661621530 has 32 divisors (see below), whose sum is σ = 10467748368. Its totient is φ = 2203430400.

The previous prime is 5661621523. The next prime is 5661621583. The reversal of 5661621530 is 351261665.

It can be written as a sum of positive squares in 8 ways, for example, as 252460321 + 5409161209 = 15889^2 + 73547^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134420 + ... + 171440.

Almost surely, 2^5661621530 is an apocalyptic number.

5661621530 is a deficient number, since it is larger than the sum of its proper divisors (4806126838).

5661621530 is a wasteful number, since it uses less digits than its factorization.

5661621530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37442.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 5661621530 is about 75243.7474478777. The cubic root of 5661621530 is about 1782.2978288279.

The spelling of 5661621530 in words is "five billion, six hundred sixty-one million, six hundred twenty-one thousand, five hundred thirty".