1006603011551 has 4 divisors (see below), whose sum is σ = 1016569378104. Its totient is φ = 996636645000.

The previous prime is 1006603011539. The next prime is 1006603011571. The reversal of 1006603011551 is 1551103066001.

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

It is a cyclic number.

It is not a de Polignac number, because 1006603011551 - 2⁶ = 1006603011487 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 (1006603011571) 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, 4983183125 + ... + 4983183326.

It is an arithmetic number, because the mean of its divisors is an integer number (254142344526).

Almost surely, 2^{1006603011551} is an apocalyptic number.

1006603011551 is a deficient number, since it is larger than the sum of its proper divisors (9966366553).

1006603011551 is an equidigital number, since it uses as much as digits as its factorization.

1006603011551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966366552.

The product of its (nonzero) digits is 2700, while the sum is 29.

Adding to 1006603011551 its reverse (1551103066001), we get a palindrome (2557706077552).

The spelling of 1006603011551 in words is "one trillion, six billion, six hundred three million, eleven thousand, five hundred fifty-one".