561277156212 has 72 divisors (see below), whose sum is σ = 1421868494592. Its totient is φ = 186685896000.

The previous prime is 561277156211. The next prime is 561277156247. The reversal of 561277156212 is 212651772165.

561277156212 is a `hidden beast` number, since 5 + 6 + 1 + 2 + 7 + 7 + 15 + 621 + 2 = 666.

It is a super-3 number, since 3×561277156212³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561277156211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104889337 + ... + 104894687.

It is an arithmetic number, because the mean of its divisors is an integer number (19748173536).

Almost surely, 2^561277156212 is an apocalyptic number.

It is an amenable number.

561277156212 is an abundant number, since it is smaller than the sum of its proper divisors (860591338380).

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

561277156212 is a wasteful number, since it uses less digits than its factorization.

561277156212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149 (or 11144 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The spelling of 561277156212 in words is "five hundred sixty-one billion, two hundred seventy-seven million, one hundred fifty-six thousand, two hundred twelve".