61541043766 has 16 divisors (see below), whose sum is σ = 98978898240. Its totient is φ = 28593901440.

The previous prime is 61541043703. The next prime is 61541043769. The reversal of 61541043766 is 66734014516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61541043769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11453205 + ... + 11458576.

It is an arithmetic number, because the mean of its divisors is an integer number (6186181140).

Almost surely, 2^61541043766 is an apocalyptic number.

61541043766 is a deficient number, since it is larger than the sum of its proper divisors (37437854474).

61541043766 is a wasteful number, since it uses less digits than its factorization.

61541043766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22911879.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 61541043766 in words is "sixty-one billion, five hundred forty-one million, forty-three thousand, seven hundred sixty-six".