5561610001 has 4 divisors (see below), whose sum is σ = 5563759104. Its totient is φ = 5559460900.

The previous prime is 5561609983. The next prime is 5561610029. The reversal of 5561610001 is 1000161655.

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.

It is a cyclic number.

It is not a de Polignac number, because 5561610001 - 2²⁵ = 5528055569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5561610091) 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, 1070665 + ... + 1075846.

It is an arithmetic number, because the mean of its divisors is an integer number (1390939776).

Almost surely, 2^5561610001 is an apocalyptic number.

It is an amenable number.

5561610001 is a deficient number, since it is larger than the sum of its proper divisors (2149103).

5561610001 is a wasteful number, since it uses less digits than its factorization.

5561610001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2149102.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 5561610001 is about 74576.2026453479. The cubic root of 5561610001 is about 1771.7407625602.

Adding to 5561610001 its reverse (1000161655), we get a palindrome (6561771656).

The spelling of 5561610001 in words is "five billion, five hundred sixty-one million, six hundred ten thousand, one".