1640158799 has 2 divisors, whose sum is σ = 1640158800. Its totient is φ = 1640158798.

The previous prime is 1640158787. The next prime is 1640158801. The reversal of 1640158799 is 9978510461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1640158799 is a prime.

Together with 1640158801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1640158739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820079399 + 820079400.

It is an arithmetic number, because the mean of its divisors is an integer number (820079400).

Almost surely, 2^1640158799 is an apocalyptic number.

1640158799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640158799 is an equidigital number, since it uses as much as digits as its factorization.

1640158799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 1640158799 is about 40498.8740460769. The cubic root of 1640158799 is about 1179.3117692627.

The spelling of 1640158799 in words is "one billion, six hundred forty million, one hundred fifty-eight thousand, seven hundred ninety-nine".