4645999991 has 2 divisors, whose sum is σ = 4645999992. Its totient is φ = 4645999990.

The previous prime is 4645999987. The next prime is 4646000011. The reversal of 4645999991 is 1999995464.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4645999991 - 2² = 4645999987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645999691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322999995 + 2322999996.

It is an arithmetic number, because the mean of its divisors is an integer number (2322999996).

Almost surely, 2^4645999991 is an apocalyptic number.

4645999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645999991 is an equidigital number, since it uses as much as digits as its factorization.

4645999991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28343520, while the sum is 65.

The square root of 4645999991 is about 68161.5726857883. The cubic root of 4645999991 is about 1668.6287991463.

The spelling of 4645999991 in words is "four billion, six hundred forty-five million, nine hundred ninety-nine thousand, nine hundred ninety-one".