1640339801 has 8 divisors (see below), whose sum is σ = 1656494400. Its totient is φ = 1624205520.

The previous prime is 1640339719. The next prime is 1640339803. The reversal of 1640339801 is 1089330461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1640339801 - 2¹⁴ = 1640323417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640339803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195470 + ... + 203688.

It is an arithmetic number, because the mean of its divisors is an integer number (207061800).

Almost surely, 2^1640339801 is an apocalyptic number.

It is an amenable number.

1640339801 is a deficient number, since it is larger than the sum of its proper divisors (16154599).

1640339801 is a wasteful number, since it uses less digits than its factorization.

1640339801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10159.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1640339801 is about 40501.1086391472. The cubic root of 1640339801 is about 1179.3551491958.

The spelling of 1640339801 in words is "one billion, six hundred forty million, three hundred thirty-nine thousand, eight hundred one".