2656503646261 has 8 divisors (see below), whose sum is σ = 2748368539800. Its totient is φ = 2564656174080.

The previous prime is 2656503646253. The next prime is 2656503646333. The reversal of 2656503646261 is 1626463056562.

It can be written as a sum of positive squares in 4 ways, for example, as 928922005636 + 1727581640625 = 963806^2 + 1314375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2656503646261 - 2³ = 2656503646253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656503646199 and 2656503646208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656503646061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4044720 + ... + 4655401.

It is an arithmetic number, because the mean of its divisors is an integer number (343546067475).

Almost surely, 2^{2656503646261} is an apocalyptic number.

It is an amenable number.

2656503646261 is a deficient number, since it is larger than the sum of its proper divisors (91864893539).

2656503646261 is a wasteful number, since it uses less digits than its factorization.

2656503646261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8710679.

The product of its (nonzero) digits is 9331200, while the sum is 52.

The spelling of 2656503646261 in words is "two trillion, six hundred fifty-six billion, five hundred three million, six hundred forty-six thousand, two hundred sixty-one".