1561163322 has 16 divisors (see below), whose sum is σ = 3229993440. Its totient is φ = 502443312.

The previous prime is 1561163321. The next prime is 1561163323. The reversal of 1561163322 is 2233611651.

It is an interprime number because it is at equal distance from previous prime (1561163321) and next prime (1561163323).

It is a self number, because there is not a number n which added to its sum of digits gives 1561163322.

It is not an unprimeable number, because it can be changed into a prime (1561163321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4485928 + ... + 4486275.

It is an arithmetic number, because the mean of its divisors is an integer number (201874590).

Almost surely, 2^1561163322 is an apocalyptic number.

1561163322 is an abundant number, since it is smaller than the sum of its proper divisors (1668830118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1561163322 is a wasteful number, since it uses less digits than its factorization.

1561163322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972237.

The product of its digits is 6480, while the sum is 30.

The square root of 1561163322 is about 39511.5593466013. The cubic root of 1561163322 is about 1160.0662174843.

Adding to 1561163322 its reverse (2233611651), we get a palindrome (3794774973).

The spelling of 1561163322 in words is "one billion, five hundred sixty-one million, one hundred sixty-three thousand, three hundred twenty-two".