1377553543 has 4 divisors (see below), whose sum is σ = 1377641608. Its totient is φ = 1377465480.

The previous prime is 1377553531. The next prime is 1377553553. The reversal of 1377553543 is 3453557731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1377553543 - 2¹⁷ = 1377422471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377553543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377553553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13521 + ... + 54202.

It is an arithmetic number, because the mean of its divisors is an integer number (344410402).

Almost surely, 2^1377553543 is an apocalyptic number.

1377553543 is a deficient number, since it is larger than the sum of its proper divisors (88065).

1377553543 is an equidigital number, since it uses as much as digits as its factorization.

1377553543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88064.

The product of its digits is 661500, while the sum is 43.

The square root of 1377553543 is about 37115.4084310007. The cubic root of 1377553543 is about 1112.6779867228.

The spelling of 1377553543 in words is "one billion, three hundred seventy-seven million, five hundred fifty-three thousand, five hundred forty-three".