1065511556001 has 64 divisors (see below), whose sum is σ = 1759677004800. Its totient is φ = 633254485248.

The previous prime is 1065511555987. The next prime is 1065511556003. The reversal of 1065511556001 is 1006551155601.

It is a happy number.

It is not a de Polignac number, because 1065511556001 - 2⁶ = 1065511555937 is a prime.

It is a super-2 number, since 2×1065511556001² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1065511556003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 94765486 + ... + 94776728.

It is an arithmetic number, because the mean of its divisors is an integer number (27494953200).

Almost surely, 2^{1065511556001} is an apocalyptic number.

It is an amenable number.

1065511556001 is a deficient number, since it is larger than the sum of its proper divisors (694165448799).

1065511556001 is a wasteful number, since it uses less digits than its factorization.

1065511556001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22155 (or 22149 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

It can be divided in two parts, 106551155600 and 1, that added together give a palindrome (106551155601).

The spelling of 1065511556001 in words is "one trillion, sixty-five billion, five hundred eleven million, five hundred fifty-six thousand, one".