561155271705 has 48 divisors (see below), whose sum is σ = 1114394246784. Its totient is φ = 255888345600.

The previous prime is 561155271661. The next prime is 561155271709. The reversal of 561155271705 is 507172551165.

561155271705 is a `hidden beast` number, since 5 + 6 + 115 + 527 + 1 + 7 + 0 + 5 = 666.

561155271705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561155271705 - 2⁷ = 561155271577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (561155271709) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2094939 + ... + 2347568.

It is an arithmetic number, because the mean of its divisors is an integer number (23216546808).

Almost surely, 2^561155271705 is an apocalyptic number.

It is an amenable number.

561155271705 is a deficient number, since it is larger than the sum of its proper divisors (553238975079).

561155271705 is a wasteful number, since it uses less digits than its factorization.

561155271705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442926 (or 4442923 counting only the distinct ones).

The product of its (nonzero) digits is 367500, while the sum is 45.

The spelling of 561155271705 in words is "five hundred sixty-one billion, one hundred fifty-five million, two hundred seventy-one thousand, seven hundred five".