5661864123 has 8 divisors (see below), whose sum is σ = 7555299600. Its totient is φ = 3771502368.

The previous prime is 5661864113. The next prime is 5661864133. The reversal of 5661864123 is 3214681665.

It is an interprime number because it is at equal distance from previous prime (5661864113) and next prime (5661864133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5661864123 - 2⁴ = 5661864107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661864113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764128 + ... + 771501.

It is an arithmetic number, because the mean of its divisors is an integer number (944412450).

Almost surely, 2^5661864123 is an apocalyptic number.

5661864123 is a deficient number, since it is larger than the sum of its proper divisors (1893435477).

5661864123 is a wasteful number, since it uses less digits than its factorization.

5661864123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536861.

The product of its digits is 207360, while the sum is 42.

The square root of 5661864123 is about 75245.3594781765. The cubic root of 5661864123 is about 1782.3232848331.

The spelling of 5661864123 in words is "five billion, six hundred sixty-one million, eight hundred sixty-four thousand, one hundred twenty-three".