823606061261 has 4 divisors (see below), whose sum is σ = 852006270300. Its totient is φ = 795205852224.

The previous prime is 823606061207. The next prime is 823606061287. The reversal of 823606061261 is 162160606328.

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 574535196361 + 249070864900 = 757981^2 + 499070^2 .

It is not a de Polignac number, because 823606061261 - 2¹⁸ = 823605799117 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 (823606001261) 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, 14200104476 + ... + 14200104533.

It is an arithmetic number, because the mean of its divisors is an integer number (213001567575).

Almost surely, 2^823606061261 is an apocalyptic number.

It is an amenable number.

823606061261 is a deficient number, since it is larger than the sum of its proper divisors (28400209039).

823606061261 is a wasteful number, since it uses less digits than its factorization.

823606061261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28400209038.

The product of its (nonzero) digits is 124416, while the sum is 41.

Adding to 823606061261 its reverse (162160606328), we get a palindrome (985766667589).

The spelling of 823606061261 in words is "eight hundred twenty-three billion, six hundred six million, sixty-one thousand, two hundred sixty-one".