1640179814 has 48 divisors (see below), whose sum is σ = 3054723840. Its totient is φ = 646719840.

The previous prime is 1640179811. The next prime is 1640179823. The reversal of 1640179814 is 4189710461.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640179811) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 848429 + ... + 850359.

It is an arithmetic number, because the mean of its divisors is an integer number (63640080).

Almost surely, 2^1640179814 is an apocalyptic number.

1640179814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1640179814 is a deficient number, since it is larger than the sum of its proper divisors (1414544026).

1640179814 is a wasteful number, since it uses less digits than its factorization.

1640179814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1640179814 is about 40499.1334969034. The cubic root of 1640179814 is about 1179.3168059967.

The spelling of 1640179814 in words is "one billion, six hundred forty million, one hundred seventy-nine thousand, eight hundred fourteen".