40755111561 has 6 divisors (see below), whose sum is σ = 58868494490. Its totient is φ = 27170074368.

The previous prime is 40755111559. The next prime is 40755111569. The reversal of 40755111561 is 16511155704.

40755111561 is a `hidden beast` number, since 4 + 0 + 75 + 511 + 15 + 61 = 666.

40755111561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 29629081161 + 11126030400 = 172131^2 + 105480^2 .

It is not a de Polignac number, because 40755111561 - 2¹ = 40755111559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40755111569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2264172856 + ... + 2264172873.

Almost surely, 2^40755111561 is an apocalyptic number.

It is an amenable number.

40755111561 is a deficient number, since it is larger than the sum of its proper divisors (18113382929).

40755111561 is a wasteful number, since it uses less digits than its factorization.

40755111561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528345735 (or 4528345732 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 40755111561 in words is "forty billion, seven hundred fifty-five million, one hundred eleven thousand, five hundred sixty-one".