61744665161172 has 96 divisors (see below), whose sum is σ = 171671293624320. Its totient is φ = 16898892796800.

The previous prime is 61744665161107. The next prime is 61744665161177. The reversal of 61744665161172 is 27116156644716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61744665161177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99480954 + ... + 100099697.

It is an arithmetic number, because the mean of its divisors is an integer number (1788242641920).

Almost surely, 2^{61744665161172} is an apocalyptic number.

It is an amenable number.

61744665161172 is an abundant number, since it is smaller than the sum of its proper divisors (109926628463148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61744665161172 is a wasteful number, since it uses less digits than its factorization.

61744665161172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199580821 (or 199580819 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 57.

The spelling of 61744665161172 in words is "sixty-one trillion, seven hundred forty-four billion, six hundred sixty-five million, one hundred sixty-one thousand, one hundred seventy-two".