1561413004 has 24 divisors (see below), whose sum is σ = 2801415456. Its totient is φ = 761040000.

The previous prime is 1561412969. The next prime is 1561413031. The reversal of 1561413004 is 4003141651.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1561413004.

It is an unprimeable number.

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, 244654 + ... + 250954.

It is an arithmetic number, because the mean of its divisors is an integer number (116725644).

Almost surely, 2^1561413004 is an apocalyptic number.

It is an amenable number.

1561413004 is a deficient number, since it is larger than the sum of its proper divisors (1240002452).

1561413004 is a wasteful number, since it uses less digits than its factorization.

1561413004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857 (or 7855 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1561413004 is about 39514.7188272927. The cubic root of 1561413004 is about 1160.1280585933.

Adding to 1561413004 its reverse (4003141651), we get a palindrome (5564554655).

The spelling of 1561413004 in words is "one billion, five hundred sixty-one million, four hundred thirteen thousand, four".