1640360039 has 4 divisors (see below), whose sum is σ = 1736851824. Its totient is φ = 1543868256.

The previous prime is 1640360011. The next prime is 1640360053. The reversal of 1640360039 is 9300630461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9300630461 = 5581 ⋅1666481.

It is a cyclic number.

It is not a de Polignac number, because 1640360039 - 2²⁰ = 1639311463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640359987 and 1640360014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640362039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48245867 + ... + 48245900.

It is an arithmetic number, because the mean of its divisors is an integer number (434212956).

Almost surely, 2^1640360039 is an apocalyptic number.

1640360039 is a deficient number, since it is larger than the sum of its proper divisors (96491785).

1640360039 is an equidigital number, since it uses as much as digits as its factorization.

1640360039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96491784.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 1640360039 is about 40501.3584833892. The cubic root of 1640360039 is about 1179.3599993477.

The spelling of 1640360039 in words is "one billion, six hundred forty million, three hundred sixty thousand, thirty-nine".