56640101 has 4 divisors (see below), whose sum is σ = 64731552. Its totient is φ = 48548652.

The previous prime is 56640097. The next prime is 56640109. The reversal of 56640101 is 10104665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10104665 = 5 ⋅2020933.

It is a cyclic number.

It is not a de Polignac number, because 56640101 - 2² = 56640097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4045715 + ... + 4045728.

It is an arithmetic number, because the mean of its divisors is an integer number (16182888).

Almost surely, 2^56640101 is an apocalyptic number.

It is an amenable number.

56640101 is a deficient number, since it is larger than the sum of its proper divisors (8091451).

56640101 is an equidigital number, since it uses as much as digits as its factorization.

56640101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091450.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 56640101 is about 7525.9617989995. The cubic root of 56640101 is about 384.0384189172.

Adding to 56640101 its reverse (10104665), we get a palindrome (66744766).

The spelling of 56640101 in words is "fifty-six million, six hundred forty thousand, one hundred one".