823361261642 has 4 divisors (see below), whose sum is σ = 1235041892466. Its totient is φ = 411680630820.

The previous prime is 823361261621. The next prime is 823361261759. The reversal of 823361261642 is 246162163328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 556484668441 + 266876593201 = 745979^2 + 516601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 823361261593 and 823361261602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205840315409 + ... + 205840315412.

Almost surely, 2^823361261642 is an apocalyptic number.

823361261642 is a deficient number, since it is larger than the sum of its proper divisors (411680630824).

823361261642 is a wasteful number, since it uses less digits than its factorization.

823361261642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411680630823.

The product of its digits is 497664, while the sum is 44.

The spelling of 823361261642 in words is "eight hundred twenty-three billion, three hundred sixty-one million, two hundred sixty-one thousand, six hundred forty-two".