1977543443253 has 8 divisors (see below), whose sum is σ = 3013399532608. Its totient is φ = 1130024824704.

The previous prime is 1977543443203. The next prime is 1977543443299. The reversal of 1977543443253 is 3523443457791.

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

It is not a de Polignac number, because 1977543443253 - 2¹⁷ = 1977543312181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1977543443193 and 1977543443202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977543443203) 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, 47084367676 + ... + 47084367717.

It is an arithmetic number, because the mean of its divisors is an integer number (376674941576).

Almost surely, 2^{1977543443253} is an apocalyptic number.

It is an amenable number.

1977543443253 is a deficient number, since it is larger than the sum of its proper divisors (1035856089355).

1977543443253 is an equidigital number, since it uses as much as digits as its factorization.

1977543443253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94168735403.

The product of its digits is 38102400, while the sum is 57.

The spelling of 1977543443253 in words is "one trillion, nine hundred seventy-seven billion, five hundred forty-three million, four hundred forty-three thousand, two hundred fifty-three".