1001550065 has 16 divisors (see below), whose sum is σ = 1255108608. Its totient is φ = 765796416.

The previous prime is 1001550029. The next prime is 1001550083. The reversal of 1001550065 is 5600551001.

It is a cyclic number.

It is not a de Polignac number, because 1001550065 - 2¹² = 1001545969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001550065.

It is an unprimeable number.

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, 188627 + ... + 193863.

It is an arithmetic number, because the mean of its divisors is an integer number (78444288).

Almost surely, 2^1001550065 is an apocalyptic number.

It is an amenable number.

1001550065 is a deficient number, since it is larger than the sum of its proper divisors (253558543).

1001550065 is a wasteful number, since it uses less digits than its factorization.

1001550065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1001550065 is about 31647.2757911325. The cubic root of 1001550065 is about 1000.5164215962.

The spelling of 1001550065 in words is "one billion, one million, five hundred fifty thousand, sixty-five".