5661915 has 16 divisors (see below), whose sum is σ = 10353408. Its totient is φ = 2588256.

The previous prime is 5661911. The next prime is 5661923. The reversal of 5661915 is 5191665.

It is not a de Polignac number, because 5661915 - 2² = 5661911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26857 + ... + 27066.

It is an arithmetic number, because the mean of its divisors is an integer number (647088).

Almost surely, 2^5661915 is an apocalyptic number.

5661915 is a deficient number, since it is larger than the sum of its proper divisors (4691493).

5661915 is a wasteful number, since it uses less digits than its factorization.

5661915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53938.

The product of its digits is 8100, while the sum is 33.

The square root of 5661915 is about 2379.4778839065. The cubic root of 5661915 is about 178.2328623416.

The spelling of 5661915 in words is "five million, six hundred sixty-one thousand, nine hundred fifteen".