28264082648261 has 4 divisors (see below), whose sum is σ = 28265871869772. Its totient is φ = 28262293426752.

The previous prime is 28264082648233. The next prime is 28264082648281. The reversal of 28264082648261 is 16284628046282.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10324461448900 + 17939621199361 = 3213170^2 + 4235519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28264082648261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28264082648261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28264082648281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894587060 + ... + 894618653.

It is an arithmetic number, because the mean of its divisors is an integer number (7066467967443).

Almost surely, 2^{28264082648261} is an apocalyptic number.

It is an amenable number.

28264082648261 is a deficient number, since it is larger than the sum of its proper divisors (1789221511).

28264082648261 is a wasteful number, since it uses less digits than its factorization.

28264082648261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789221510.

The product of its (nonzero) digits is 28311552, while the sum is 59.

The spelling of 28264082648261 in words is "twenty-eight trillion, two hundred sixty-four billion, eighty-two million, six hundred forty-eight thousand, two hundred sixty-one".