1276010001961 has 2 divisors, whose sum is σ = 1276010001962. Its totient is φ = 1276010001960.

The previous prime is 1276010001881. The next prime is 1276010001967. The reversal of 1276010001961 is 1691000106721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1257383211561 + 18626790400 = 1121331^2 + 136480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276010001961 is a prime.

It is a super-2 number, since 2×1276010001961² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276010001967) 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, 638005000980 + 638005000981.

It is an arithmetic number, because the mean of its divisors is an integer number (638005000981).

Almost surely, 2^{1276010001961} is an apocalyptic number.

It is an amenable number.

1276010001961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276010001961 is an equidigital number, since it uses as much as digits as its factorization.

1276010001961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 1276010001961 in words is "one trillion, two hundred seventy-six billion, ten million, one thousand, nine hundred sixty-one".