100280260261 has 4 divisors (see below), whose sum is σ = 103738200300. Its totient is φ = 96822320224.

The previous prime is 100280260237. The next prime is 100280260271. The reversal of 100280260261 is 162062082001.

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 63375545025 + 36904715236 = 251745^2 + 192106^2 .

It is a cyclic number.

It is not a de Polignac number, because 100280260261 - 2⁹ = 100280259749 is a prime.

It is a super-2 number, since 2×100280260261² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100280260271) 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, 1728969976 + ... + 1728970033.

It is an arithmetic number, because the mean of its divisors is an integer number (25934550075).

Almost surely, 2^100280260261 is an apocalyptic number.

It is an amenable number.

100280260261 is a deficient number, since it is larger than the sum of its proper divisors (3457940039).

100280260261 is an equidigital number, since it uses as much as digits as its factorization.

100280260261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457940038.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 100280260261 in words is "one hundred billion, two hundred eighty million, two hundred sixty thousand, two hundred sixty-one".