561672640231758 has 192 divisors, whose sum is σ = 1381516186482432. Its totient is φ = 169616423623680.

The previous prime is 561672640231757. The next prime is 561672640231763. The reversal of 561672640231758 is 857132046276165.

561672640231758 is a `hidden beast` number, since 5 + 6 + 1 + 6 + 7 + 264 + 0 + 2 + 317 + 58 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 561672640231695 and 561672640231704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561672640231757) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3070282060 + ... + 3070464992.

It is an arithmetic number, because the mean of its divisors is an integer number (7195396804596).

Almost surely, 2^{561672640231758} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561672640231758, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690758093241216).

561672640231758 is an abundant number, since it is smaller than the sum of its proper divisors (819843546250674).

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

561672640231758 is a wasteful number, since it uses less digits than its factorization.

561672640231758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184941 (or 184929 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 561672640231758 in words is "five hundred sixty-one trillion, six hundred seventy-two billion, six hundred forty million, two hundred thirty-one thousand, seven hundred fifty-eight".