1028977270961 has 2 divisors, whose sum is σ = 1028977270962. Its totient is φ = 1028977270960.

The previous prime is 1028977270957. The next prime is 1028977271071. The reversal of 1028977270961 is 1690727798201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876178369936 + 152798901025 = 936044^2 + 390895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028977270961 - 2² = 1028977270957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1028977270961.

It is not a weakly prime, because it can be changed into another prime (1028977270901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514488635480 + 514488635481.

It is an arithmetic number, because the mean of its divisors is an integer number (514488635481).

Almost surely, 2^{1028977270961} is an apocalyptic number.

It is an amenable number.

1028977270961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028977270961 is an equidigital number, since it uses as much as digits as its factorization.

1028977270961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 59.

The spelling of 1028977270961 in words is "one trillion, twenty-eight billion, nine hundred seventy-seven million, two hundred seventy thousand, nine hundred sixty-one".