1005510005501 has 2 divisors, whose sum is σ = 1005510005502. Its totient is φ = 1005510005500.

The previous prime is 1005510005417. The next prime is 1005510005569. The reversal of 1005510005501 is 1055000155001.

It is a happy number.

1005510005501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1004314644025 + 1195361476 = 1002155^2 + 34574^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005510005501 - 2³⁴ = 988330136317 is a prime.

It is a super-2 number, since 2×1005510005501² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005510065501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502755002750 + 502755002751.

It is an arithmetic number, because the mean of its divisors is an integer number (502755002751).

Almost surely, 2^{1005510005501} is an apocalyptic number.

It is an amenable number.

1005510005501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005510005501 is an equidigital number, since it uses as much as digits as its factorization.

1005510005501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625, while the sum is 23.

The spelling of 1005510005501 in words is "one trillion, five billion, five hundred ten million, five thousand, five hundred one".