5655561001 has 4 divisors (see below), whose sum is σ = 5656134400. Its totient is φ = 5654987604.

The previous prime is 5655560993. The next prime is 5655561007. The reversal of 5655561001 is 1001655565.

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: 1001655565 = 5 ⋅200331113.

It is a cyclic number.

It is not a de Polignac number, because 5655561001 - 2³ = 5655560993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5655561007) 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, 271641 + ... + 291718.

It is an arithmetic number, because the mean of its divisors is an integer number (1414033600).

Almost surely, 2^5655561001 is an apocalyptic number.

It is an amenable number.

5655561001 is a deficient number, since it is larger than the sum of its proper divisors (573399).

5655561001 is a wasteful number, since it uses less digits than its factorization.

5655561001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573398.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 5655561001 is about 75203.4640226100. The cubic root of 5655561001 is about 1781.6616433488.

The spelling of 5655561001 in words is "five billion, six hundred fifty-five million, five hundred sixty-one thousand, one".