1001916861 has 32 divisors (see below), whose sum is σ = 1489376256. Its totient is φ = 594000000.

The previous prime is 1001916859. The next prime is 1001916901. The reversal of 1001916861 is 1686191001.

It is not a de Polignac number, because 1001916861 - 2¹ = 1001916859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001916361) 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 31 ways as a sum of consecutive naturals, for example, 332361 + ... + 335361.

It is an arithmetic number, because the mean of its divisors is an integer number (46543008).

Almost surely, 2^1001916861 is an apocalyptic number.

1001916861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001916861 is a deficient number, since it is larger than the sum of its proper divisors (487459395).

1001916861 is a wasteful number, since it uses less digits than its factorization.

1001916861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 1001916861 is about 31653.0703250095. The cubic root of 1001916861 is about 1000.6385458391.

The spelling of 1001916861 in words is "one billion, one million, nine hundred sixteen thousand, eight hundred sixty-one".