556601551001 has 4 divisors (see below), whose sum is σ = 556606708404. Its totient is φ = 556596393600.

The previous prime is 556601550997. The next prime is 556601551153. The reversal of 556601551001 is 100155106655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108372640000 + 448228911001 = 329200^2 + 669499^2 .

It is a cyclic number.

It is not a de Polignac number, because 556601551001 - 2² = 556601550997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556601551201) 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, 2413280 + ... + 2633841.

It is an arithmetic number, because the mean of its divisors is an integer number (139151677101).

Almost surely, 2^556601551001 is an apocalyptic number.

It is an amenable number.

556601551001 is a deficient number, since it is larger than the sum of its proper divisors (5157403).

556601551001 is a wasteful number, since it uses less digits than its factorization.

556601551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5157402.

The product of its (nonzero) digits is 22500, while the sum is 35.

Adding to 556601551001 its reverse (100155106655), we get a palindrome (656756657656).

The spelling of 556601551001 in words is "five hundred fifty-six billion, six hundred one million, five hundred fifty-one thousand, one".