1277871520441 has 2 divisors, whose sum is σ = 1277871520442. Its totient is φ = 1277871520440.

The previous prime is 1277871520399. The next prime is 1277871520553. The reversal of 1277871520441 is 1440251787721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261533312400 + 16338208041 = 1123180^2 + 127821^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277871520441 - 2³⁷ = 1140432566969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277871520741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638935760220 + 638935760221.

It is an arithmetic number, because the mean of its divisors is an integer number (638935760221).

Almost surely, 2^{1277871520441} is an apocalyptic number.

It is an amenable number.

1277871520441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277871520441 is an equidigital number, since it uses as much as digits as its factorization.

1277871520441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 878080, while the sum is 49.

The spelling of 1277871520441 in words is "one trillion, two hundred seventy-seven billion, eight hundred seventy-one million, five hundred twenty thousand, four hundred forty-one".