563721956406 has 48 divisors (see below), whose sum is σ = 1447582316544. Its totient is φ = 161063415144.

The previous prime is 563721956401. The next prime is 563721956431. The reversal of 563721956406 is 604659127365.

563721956406 is a `hidden beast` number, since 5 + 6 + 3 + 72 + 1 + 9 + 564 + 0 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (563721956401) 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, 82848150 + ... + 82854953.

It is an arithmetic number, because the mean of its divisors is an integer number (30157964928).

Almost surely, 2^563721956406 is an apocalyptic number.

563721956406 is an abundant number, since it is smaller than the sum of its proper divisors (883860360138).

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

563721956406 is a wasteful number, since it uses less digits than its factorization.

563721956406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165703127 (or 165703115 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

It can be divided in two parts, 5637219 and 56406, that added together give a triangular number (5693625 = T₃₃₇₄).

The spelling of 563721956406 in words is "five hundred sixty-three billion, seven hundred twenty-one million, nine hundred fifty-six thousand, four hundred six".