1601495521979 has 2 divisors, whose sum is σ = 1601495521980. Its totient is φ = 1601495521978.

The previous prime is 1601495521883. The next prime is 1601495521991. The reversal of 1601495521979 is 9791255941061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1601495521979 - 2⁸ = 1601495521723 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601495521579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800747760989 + 800747760990.

It is an arithmetic number, because the mean of its divisors is an integer number (800747760990).

Almost surely, 2^{1601495521979} is an apocalyptic number.

1601495521979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601495521979 is an equidigital number, since it uses as much as digits as its factorization.

1601495521979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6123600, while the sum is 59.

The spelling of 1601495521979 in words is "one trillion, six hundred one billion, four hundred ninety-five million, five hundred twenty-one thousand, nine hundred seventy-nine".