1988165011 has 32 divisors (see below), whose sum is σ = 2516410368. Its totient is φ = 1530524160.

The previous prime is 1988164999. The next prime is 1988165029. The reversal of 1988165011 is 1105618891.

It is a cyclic number.

It is not a de Polignac number, because 1988165011 - 2¹¹ = 1988162963 is a prime.

It is a super-2 number, since 2×1988165011² = 7905600221929260242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988165041) 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, 2005726 + ... + 2006716.

It is an arithmetic number, because the mean of its divisors is an integer number (78637824).

Almost surely, 2^1988165011 is an apocalyptic number.

1988165011 is a deficient number, since it is larger than the sum of its proper divisors (528245357).

1988165011 is a wasteful number, since it uses less digits than its factorization.

1988165011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 17280, while the sum is 40.

The square root of 1988165011 is about 44588.8440195527. The cubic root of 1988165011 is about 1257.4309397179.

The spelling of 1988165011 in words is "one billion, nine hundred eighty-eight million, one hundred sixty-five thousand, eleven".