1640450363 has 2 divisors, whose sum is σ = 1640450364. Its totient is φ = 1640450362.

The previous prime is 1640450359. The next prime is 1640450381. The reversal of 1640450363 is 3630540461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640450363 - 2² = 1640450359 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640450393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820225181 + 820225182.

It is an arithmetic number, because the mean of its divisors is an integer number (820225182).

Almost surely, 2^1640450363 is an apocalyptic number.

1640450363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640450363 is an equidigital number, since it uses as much as digits as its factorization.

1640450363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 1640450363 is about 40502.4735417480. The cubic root of 1640450363 is about 1179.3816455219.

The spelling of 1640450363 in words is "one billion, six hundred forty million, four hundred fifty thousand, three hundred sixty-three".