10332778261 has 4 divisors (see below), whose sum is σ = 11127607372. Its totient is φ = 9537949152.

The previous prime is 10332778259. The next prime is 10332778283. The reversal of 10332778261 is 16287723301.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16287723301 = 5807 ⋅2804843.

It can be written as a sum of positive squares in 2 ways, for example, as 852056100 + 9480722161 = 29190^2 + 97369^2 .

It is a cyclic number.

It is not a de Polignac number, because 10332778261 - 2¹ = 10332778259 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 (10332778241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397414536 + ... + 397414561.

It is an arithmetic number, because the mean of its divisors is an integer number (2781901843).

Almost surely, 2^10332778261 is an apocalyptic number.

It is an amenable number.

10332778261 is a deficient number, since it is larger than the sum of its proper divisors (794829111).

10332778261 is an equidigital number, since it uses as much as digits as its factorization.

10332778261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794829110.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 10332778261 in words is "ten billion, three hundred thirty-two million, seven hundred seventy-eight thousand, two hundred sixty-one".