1601326081 has 2 divisors, whose sum is σ = 1601326082. Its totient is φ = 1601326080.

The previous prime is 1601326073. The next prime is 1601326087. The reversal of 1601326081 is 1806231061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1568160000 + 33166081 = 39600^2 + 5759^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601326081 - 2³ = 1601326073 is a prime.

It is a super-2 number, since 2×1601326081² = 5128490435381637122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1601326087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800663040 + 800663041.

It is an arithmetic number, because the mean of its divisors is an integer number (800663041).

Almost surely, 2^1601326081 is an apocalyptic number.

It is an amenable number.

1601326081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601326081 is an equidigital number, since it uses as much as digits as its factorization.

1601326081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1601326081 is about 40016.5725793702. The cubic root of 1601326081 is about 1169.9301297550.

The spelling of 1601326081 in words is "one billion, six hundred one million, three hundred twenty-six thousand, eighty-one".