1001156616 has 48 divisors (see below), whose sum is σ = 2774531760. Its totient is φ = 325956960.

The previous prime is 1001156599. The next prime is 1001156623. The reversal of 1001156616 is 6166511001.

It is a self number, because there is not a number n which added to its sum of digits gives 1001156616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158590 + ... + 164781.

It is an arithmetic number, because the mean of its divisors is an integer number (57802745).

Almost surely, 2^1001156616 is an apocalyptic number.

It is an amenable number.

1001156616 is an abundant number, since it is smaller than the sum of its proper divisors (1773375144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001156616 is a wasteful number, since it uses less digits than its factorization.

1001156616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323426 (or 323419 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1001156616 is about 31641.0590214677. The cubic root of 1001156616 is about 1000.3853901220.

Adding to 1001156616 its reverse (6166511001), we get a palindrome (7167667617).

The spelling of 1001156616 in words is "one billion, one million, one hundred fifty-six thousand, six hundred sixteen".