1277889025139 has 2 divisors, whose sum is σ = 1277889025140. Its totient is φ = 1277889025138.

The previous prime is 1277889025129. The next prime is 1277889025181. The reversal of 1277889025139 is 9315209887721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277889025139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1277889025129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638944512569 + 638944512570.

It is an arithmetic number, because the mean of its divisors is an integer number (638944512570).

Almost surely, 2^{1277889025139} is an apocalyptic number.

1277889025139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277889025139 is an equidigital number, since it uses as much as digits as its factorization.

1277889025139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 62.

The spelling of 1277889025139 in words is "one trillion, two hundred seventy-seven billion, eight hundred eighty-nine million, twenty-five thousand, one hundred thirty-nine".