61374744350173 has 4 divisors (see below), whose sum is σ = 63033521224540. Its totient is φ = 59715967475808.

The previous prime is 61374744350131. The next prime is 61374744350197. The reversal of 61374744350173 is 37105344747316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28278805399524 + 33095938950649 = 5317782^2 + 5752907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61374744350173 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 (61374744300173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829388437128 + ... + 829388437201.

It is an arithmetic number, because the mean of its divisors is an integer number (15758380306135).

Almost surely, 2^{61374744350173} is an apocalyptic number.

It is an amenable number.

61374744350173 is a deficient number, since it is larger than the sum of its proper divisors (1658776874367).

61374744350173 is a wasteful number, since it uses less digits than its factorization.

61374744350173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658776874366.

The product of its (nonzero) digits is 17781120, while the sum is 55.

The spelling of 61374744350173 in words is "sixty-one trillion, three hundred seventy-four billion, seven hundred forty-four million, three hundred fifty thousand, one hundred seventy-three".