561802020812 has 6 divisors (see below), whose sum is σ = 983153536428. Its totient is φ = 280901010404.

The previous prime is 561802020803. The next prime is 561802020839. The reversal of 561802020812 is 218020208165.

It is a happy number.

It is a super-2 number, since 2×561802020812² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70225252598 + ... + 70225252605.

It is an arithmetic number, because the mean of its divisors is an integer number (163858922738).

Almost surely, 2^561802020812 is an apocalyptic number.

It is an amenable number.

561802020812 is a deficient number, since it is larger than the sum of its proper divisors (421351515616).

561802020812 is a wasteful number, since it uses less digits than its factorization.

561802020812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140450505207 (or 140450505205 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

Adding to 561802020812 its reverse (218020208165), we get a palindrome (779822228977).

The spelling of 561802020812 in words is "five hundred sixty-one billion, eight hundred two million, twenty thousand, eight hundred twelve".