1601495977 has 2 divisors, whose sum is σ = 1601495978. Its totient is φ = 1601495976.

The previous prime is 1601495969. The next prime is 1601496007. The reversal of 1601495977 is 7795941061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357480336 + 244015641 = 36844^2 + 15621^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601495977 - 2³ = 1601495969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1601495977.

It is not a weakly prime, because it can be changed into another prime (1601495947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800747988 + 800747989.

It is an arithmetic number, because the mean of its divisors is an integer number (800747989).

Almost surely, 2^1601495977 is an apocalyptic number.

It is an amenable number.

1601495977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601495977 is an equidigital number, since it uses as much as digits as its factorization.

1601495977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1601495977 is about 40018.6953435516. The cubic root of 1601495977 is about 1169.9715036769.

The spelling of 1601495977 in words is "one billion, six hundred one million, four hundred ninety-five thousand, nine hundred seventy-seven".