1065890455971 has 16 divisors (see below), whose sum is σ = 1552297853568. Its totient is φ = 645197659200.

The previous prime is 1065890455967. The next prime is 1065890455997. The reversal of 1065890455971 is 1795540985601.

It is a happy number.

It is not a de Polignac number, because 1065890455971 - 2² = 1065890455967 is a prime.

It is a super-2 number, since 2×1065890455971² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1065890455921) 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 15 ways as a sum of consecutive naturals, for example, 19886746 + ... + 19940271.

It is an arithmetic number, because the mean of its divisors is an integer number (97018615848).

Almost surely, 2^{1065890455971} is an apocalyptic number.

1065890455971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1065890455971 is a deficient number, since it is larger than the sum of its proper divisors (486407397597).

1065890455971 is a wasteful number, since it uses less digits than its factorization.

1065890455971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39827842.

The product of its (nonzero) digits is 13608000, while the sum is 60.

The spelling of 1065890455971 in words is "one trillion, sixty-five billion, eight hundred ninety million, four hundred fifty-five thousand, nine hundred seventy-one".