10282720405 has 4 divisors (see below), whose sum is σ = 12339264492. Its totient is φ = 8226176320.

The previous prime is 10282720403. The next prime is 10282720439. The reversal of 10282720405 is 50402728201.

It is a happy number.

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 3149566641 + 7133153764 = 56121^2 + 84458^2 .

It is not a de Polignac number, because 10282720405 - 2¹ = 10282720403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10282720403) 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, 1028272036 + ... + 1028272045.

It is an arithmetic number, because the mean of its divisors is an integer number (3084816123).

Almost surely, 2^10282720405 is an apocalyptic number.

It is an amenable number.

10282720405 is a deficient number, since it is larger than the sum of its proper divisors (2056544087).

10282720405 is an equidigital number, since it uses as much as digits as its factorization.

10282720405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056544086.

The product of its (nonzero) digits is 8960, while the sum is 31.

The spelling of 10282720405 in words is "ten billion, two hundred eighty-two million, seven hundred twenty thousand, four hundred five".