1561479468 has 24 divisors (see below), whose sum is σ = 3728184768. Its totient is φ = 508388496.

The previous prime is 1561479463. The next prime is 1561479473. The reversal of 1561479468 is 8649741651.

It is an interprime number because it is at equal distance from previous prime (1561479463) and next prime (1561479473).

It is a self number, because there is not a number n which added to its sum of digits gives 1561479468.

It is not an unprimeable number, because it can be changed into a prime (1561479463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512546 + ... + 1513577.

It is an arithmetic number, because the mean of its divisors is an integer number (155341032).

Almost surely, 2^1561479468 is an apocalyptic number.

It is an amenable number.

1561479468 is an abundant number, since it is smaller than the sum of its proper divisors (2166705300).

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

1561479468 is a wasteful number, since it uses less digits than its factorization.

1561479468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026173 (or 3026171 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 1561479468 is about 39515.5598214172. The cubic root of 1561479468 is about 1160.1445192515.

The spelling of 1561479468 in words is "one billion, five hundred sixty-one million, four hundred seventy-nine thousand, four hundred sixty-eight".