1640736014 has 4 divisors (see below), whose sum is σ = 2461104024. Its totient is φ = 820368006.

The previous prime is 1640736007. The next prime is 1640736023. The reversal of 1640736014 is 4106370461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4106370461 = 19211 ⋅213751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410184002 + ... + 410184005.

It is an arithmetic number, because the mean of its divisors is an integer number (615276006).

Almost surely, 2^1640736014 is an apocalyptic number.

1640736014 is a deficient number, since it is larger than the sum of its proper divisors (820368010).

1640736014 is an equidigital number, since it uses as much as digits as its factorization.

1640736014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820368009.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1640736014 is about 40505.9997284353. Note that the first 3 decimals coincide. The cubic root of 1640736014 is about 1179.4500966419.

The spelling of 1640736014 in words is "one billion, six hundred forty million, seven hundred thirty-six thousand, fourteen".