1288016641 has 2 divisors, whose sum is σ = 1288016642. Its totient is φ = 1288016640.

The previous prime is 1288016621. The next prime is 1288016677. The reversal of 1288016641 is 1466108821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148871025 + 139145616 = 33895^2 + 11796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1288016641 - 2²⁹ = 751145729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1288016641.

It is not a weakly prime, because it can be changed into another prime (1288016621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644008320 + 644008321.

It is an arithmetic number, because the mean of its divisors is an integer number (644008321).

Almost surely, 2^1288016641 is an apocalyptic number.

It is an amenable number.

1288016641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288016641 is an equidigital number, since it uses as much as digits as its factorization.

1288016641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1288016641 is about 35888.9487307723. The cubic root of 1288016641 is about 1088.0290508323.

The spelling of 1288016641 in words is "one billion, two hundred eighty-eight million, sixteen thousand, six hundred forty-one".