1640173011 has 16 divisors (see below), whose sum is σ = 2195244960. Its totient is φ = 1089285120.

The previous prime is 1640173009. The next prime is 1640173013. The reversal of 1640173011 is 1103710461.

It is an interprime number because it is at equal distance from previous prime (1640173009) and next prime (1640173013).

It is not a de Polignac number, because 1640173011 - 2¹ = 1640173009 is a prime.

It is a super-2 number, since 2×1640173011² = 5380335012025612242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1640173013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1333945 + ... + 1335173.

It is an arithmetic number, because the mean of its divisors is an integer number (137202810).

Almost surely, 2^1640173011 is an apocalyptic number.

1640173011 is a deficient number, since it is larger than the sum of its proper divisors (555071949).

1640173011 is a wasteful number, since it uses less digits than its factorization.

1640173011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1640173011 is about 40499.0495073650. The cubic root of 1640173011 is about 1179.3151755041.

Adding to 1640173011 its reverse (1103710461), we get a palindrome (2743883472).

The spelling of 1640173011 in words is "one billion, six hundred forty million, one hundred seventy-three thousand, eleven".