28626824261 has 16 divisors (see below), whose sum is σ = 34151445120. Its totient is φ = 23482716480.

The previous prime is 28626824231. The next prime is 28626824269. The reversal of 28626824261 is 16242862682.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28626824261 is a prime.

It is a super-2 number, since 2×28626824261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28626824269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890171 + ... + 921768.

It is an arithmetic number, because the mean of its divisors is an integer number (2134465320).

Almost surely, 2^28626824261 is an apocalyptic number.

It is an amenable number.

28626824261 is a deficient number, since it is larger than the sum of its proper divisors (5524620859).

28626824261 is a wasteful number, since it uses less digits than its factorization.

28626824261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812044.

The product of its digits is 884736, while the sum is 47.

The spelling of 28626824261 in words is "twenty-eight billion, six hundred twenty-six million, eight hundred twenty-four thousand, two hundred sixty-one".