260252778056 has 8 divisors (see below), whose sum is σ = 487973958870. Its totient is φ = 130126389024.

The previous prime is 260252778047. The next prime is 260252778059. The reversal of 260252778056 is 650877252062.

It can be written as a sum of positive squares in only one way, i.e., 260236697956 + 16080100 = 510134^2 + 4010^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 260252777995 and 260252778013.

It is not an unprimeable number, because it can be changed into a prime (260252778059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16265798621 + ... + 16265798636.

Almost surely, 2^260252778056 is an apocalyptic number.

It is an amenable number.

260252778056 is a deficient number, since it is larger than the sum of its proper divisors (227721180814).

260252778056 is a wasteful number, since it uses less digits than its factorization.

260252778056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32531597263 (or 32531597259 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 260252778056 in words is "two hundred sixty billion, two hundred fifty-two million, seven hundred seventy-eight thousand, fifty-six".