1278488801137 has 2 divisors, whose sum is σ = 1278488801138. Its totient is φ = 1278488801136.

The previous prime is 1278488801089. The next prime is 1278488801179. The reversal of 1278488801137 is 7311088848721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956564197681 + 321924603456 = 978041^2 + 567384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1278488801137 - 2¹⁵ = 1278488768369 is a prime.

It is a super-2 number, since 2×1278488801137² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1278488801437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639244400568 + 639244400569.

It is an arithmetic number, because the mean of its divisors is an integer number (639244400569).

Almost surely, 2^{1278488801137} is an apocalyptic number.

It is an amenable number.

1278488801137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278488801137 is an equidigital number, since it uses as much as digits as its factorization.

1278488801137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4816896, while the sum is 58.

The spelling of 1278488801137 in words is "one trillion, two hundred seventy-eight billion, four hundred eighty-eight million, eight hundred one thousand, one hundred thirty-seven".