561003996004 has 9 divisors (see below), whose sum is σ = 981759614521. Its totient is φ = 280501249000.

The previous prime is 561003995999. The next prime is 561003996079. The reversal of 561003996004 is 400699300165.

The square root of 561003996004 is 749002.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 546709402404 + 14294593600 = 739398^2 + 119560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1310754 + ... + 1685254.

Almost surely, 2^561003996004 is an apocalyptic number.

561003996004 is the 749002-nd square number.

It is an amenable number.

561003996004 is a deficient number, since it is larger than the sum of its proper divisors (420755618517).

561003996004 is an frugal number, since it uses more digits than its factorization.

561003996004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749006 (or 374503 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 561003996004 in words is "five hundred sixty-one billion, three million, nine hundred ninety-six thousand, four".