5281260609778 has 4 divisors (see below), whose sum is σ = 7921890914670. Its totient is φ = 2640630304888.

The previous prime is 5281260609733. The next prime is 5281260609811. The reversal of 5281260609778 is 8779060621825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5055765741009 + 225494868769 = 2248503^2 + 474863^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320315152443 + ... + 1320315152446.

Almost surely, 2^{5281260609778} is an apocalyptic number.

5281260609778 is a deficient number, since it is larger than the sum of its proper divisors (2640630304892).

5281260609778 is a wasteful number, since it uses less digits than its factorization.

5281260609778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640630304891.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 5281260609778 in words is "five trillion, two hundred eighty-one billion, two hundred sixty million, six hundred nine thousand, seven hundred seventy-eight".