1980555547423 has 8 divisors (see below), whose sum is σ = 1993966091568. Its totient is φ = 1967178912384.

The previous prime is 1980555547391. The next prime is 1980555547489. The reversal of 1980555547423 is 3247455550891.

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 1980555547423 - 2⁵ = 1980555547391 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 (1980555547123) 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, 8360061 + ... + 8593702.

It is an arithmetic number, because the mean of its divisors is an integer number (249245761446).

Almost surely, 2^{1980555547423} is an apocalyptic number.

1980555547423 is a deficient number, since it is larger than the sum of its proper divisors (13410544145).

1980555547423 is a wasteful number, since it uses less digits than its factorization.

1980555547423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16954553.

The product of its (nonzero) digits is 30240000, while the sum is 58.

The spelling of 1980555547423 in words is "one trillion, nine hundred eighty billion, five hundred fifty-five million, five hundred forty-seven thousand, four hundred twenty-three".