61171550117 has 16 divisors (see below), whose sum is σ = 62675266800. Its totient is φ = 59685949440.

The previous prime is 61171550093. The next prime is 61171550119. The reversal of 61171550117 is 71105517116.

It can be written as a sum of positive squares in 8 ways, for example, as 14969767201 + 46201782916 = 122351^2 + 214946^2 .

It is a cyclic number.

It is not a de Polignac number, because 61171550117 - 2²⁰ = 61170501541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61171550119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3861509 + ... + 3877317.

It is an arithmetic number, because the mean of its divisors is an integer number (3917204175).

Almost surely, 2^61171550117 is an apocalyptic number.

It is an amenable number.

61171550117 is a deficient number, since it is larger than the sum of its proper divisors (1503716683).

61171550117 is a wasteful number, since it uses less digits than its factorization.

61171550117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16376.

The product of its (nonzero) digits is 7350, while the sum is 35.

The spelling of 61171550117 in words is "sixty-one billion, one hundred seventy-one million, five hundred fifty thousand, one hundred seventeen".