1977974342173 has 8 divisors (see below), whose sum is σ = 1991117504160. Its totient is φ = 1964838074160.

The previous prime is 1977974342159. The next prime is 1977974342191. The reversal of 1977974342173 is 3712434797791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1977974342173 - 2¹³ = 1977974333981 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 (1977974342873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147123 + ... + 2296048.

It is an arithmetic number, because the mean of its divisors is an integer number (248889688020).

Almost surely, 2^{1977974342173} is an apocalyptic number.

It is an amenable number.

1977974342173 is a deficient number, since it is larger than the sum of its proper divisors (13143161987).

1977974342173 is a wasteful number, since it uses less digits than its factorization.

1977974342173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446987.

The product of its digits is 56010528, while the sum is 64.

The spelling of 1977974342173 in words is "one trillion, nine hundred seventy-seven billion, nine hundred seventy-four million, three hundred forty-two thousand, one hundred seventy-three".