1377580878881 has 2 divisors, whose sum is σ = 1377580878882. Its totient is φ = 1377580878880.

The previous prime is 1377580878857. The next prime is 1377580878889. The reversal of 1377580878881 is 1888780857731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1137456378256 + 240124500625 = 1066516^2 + 490025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377580878881 is a prime.

It is a super-2 number, since 2×1377580878881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1377580878889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688790439440 + 688790439441.

It is an arithmetic number, because the mean of its divisors is an integer number (688790439441).

Almost surely, 2^{1377580878881} is an apocalyptic number.

It is an amenable number.

1377580878881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377580878881 is an equidigital number, since it uses as much as digits as its factorization.

1377580878881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168591360, while the sum is 71.

The spelling of 1377580878881 in words is "one trillion, three hundred seventy-seven billion, five hundred eighty million, eight hundred seventy-eight thousand, eight hundred eighty-one".