1065150721499 has 4 divisors (see below), whose sum is σ = 1065403310664. Its totient is φ = 1064898132336.

The previous prime is 1065150721493. The next prime is 1065150721507. The reversal of 1065150721499 is 9941270515601.

It is a happy number.

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 1065150721499 - 2³⁶ = 996431244763 is a prime.

It is a super-2 number, since 2×1065150721499² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065150721493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126288257 + ... + 126296690.

It is an arithmetic number, because the mean of its divisors is an integer number (266350827666).

Almost surely, 2^{1065150721499} is an apocalyptic number.

1065150721499 is a deficient number, since it is larger than the sum of its proper divisors (252589165).

1065150721499 is an equidigital number, since it uses as much as digits as its factorization.

1065150721499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252589164.

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 1065150721499 in words is "one trillion, sixty-five billion, one hundred fifty million, seven hundred twenty-one thousand, four hundred ninety-nine".