61646006165 has 16 divisors (see below), whose sum is σ = 75692588400. Its totient is φ = 48182737920.

The previous prime is 61646006159. The next prime is 61646006167. The reversal of 61646006165 is 56160064616.

It can be written as a sum of positive squares in 8 ways, for example, as 12797491876 + 48848514289 = 113126^2 + 221017^2 .

It is not a de Polignac number, because 61646006165 - 2²⁶ = 61578897301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61646006167) 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, 632804 + ... + 723693.

It is an arithmetic number, because the mean of its divisors is an integer number (4730786775).

Almost surely, 2^61646006165 is an apocalyptic number.

It is an amenable number.

61646006165 is a deficient number, since it is larger than the sum of its proper divisors (14046582235).

61646006165 is a wasteful number, since it uses less digits than its factorization.

61646006165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356712.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 61646006165 in words is "sixty-one billion, six hundred forty-six million, six thousand, one hundred sixty-five".