1640180164 has 24 divisors (see below), whose sum is σ = 3295083008. Its totient is φ = 699779520.

The previous prime is 1640180153. The next prime is 1640180177. The reversal of 1640180164 is 4610810461.

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 7 ways as a sum of consecutive naturals, for example, 125097 + ... + 137584.

Almost surely, 2^1640180164 is an apocalyptic number.

1640180164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1640180164 is an abundant number, since it is smaller than the sum of its proper divisors (1654902844).

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

1640180164 is a wasteful number, since it uses less digits than its factorization.

1640180164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262915 (or 262913 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1640180164 is about 40499.1378179832. The cubic root of 1640180164 is about 1179.3168898820.

The spelling of 1640180164 in words is "one billion, six hundred forty million, one hundred eighty thousand, one hundred sixty-four".