1601384651 has 2 divisors, whose sum is σ = 1601384652. Its totient is φ = 1601384650.

The previous prime is 1601384647. The next prime is 1601384671. The reversal of 1601384651 is 1564831061.

It is a weak prime.

It is an emirp because it is prime and its reverse (1564831061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1601384651 - 2² = 1601384647 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601384671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800692325 + 800692326.

It is an arithmetic number, because the mean of its divisors is an integer number (800692326).

Almost surely, 2^1601384651 is an apocalyptic number.

1601384651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601384651 is an equidigital number, since it uses as much as digits as its factorization.

1601384651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 1601384651 is about 40017.3043944741. The cubic root of 1601384651 is about 1169.9443933443.

The spelling of 1601384651 in words is "one billion, six hundred one million, three hundred eighty-four thousand, six hundred fifty-one".