1640158811 has 2 divisors, whose sum is σ = 1640158812. Its totient is φ = 1640158810.

The previous prime is 1640158801. The next prime is 1640158841. The reversal of 1640158811 is 1188510461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1640158811 - 2¹⁸ = 1639896667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1640158801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820079405 + 820079406.

It is an arithmetic number, because the mean of its divisors is an integer number (820079406).

Almost surely, 2^1640158811 is an apocalyptic number.

1640158811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640158811 is an equidigital number, since it uses as much as digits as its factorization.

1640158811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 35.

The square root of 1640158811 is about 40498.8741942292. The cubic root of 1640158811 is about 1179.3117721388.

The spelling of 1640158811 in words is "one billion, six hundred forty million, one hundred fifty-eight thousand, eight hundred eleven".