1640361235 has 8 divisors (see below), whose sum is σ = 1968677856. Its totient is φ = 1312126080.

The previous prime is 1640361157. The next prime is 1640361259. The reversal of 1640361235 is 5321630461.

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

It is not a de Polignac number, because 1640361235 - 2¹¹ = 1640359187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640361197 and 1640361206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40450 + ... + 70120.

It is an arithmetic number, because the mean of its divisors is an integer number (246084732).

Almost surely, 2^1640361235 is an apocalyptic number.

1640361235 is a deficient number, since it is larger than the sum of its proper divisors (328316621).

1640361235 is a wasteful number, since it uses less digits than its factorization.

1640361235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40733.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1640361235 is about 40501.3732483233. The cubic root of 1640361235 is about 1179.3602859747.

Adding to 1640361235 its reverse (5321630461), we get a palindrome (6961991696).

The spelling of 1640361235 in words is "one billion, six hundred forty million, three hundred sixty-one thousand, two hundred thirty-five".