1940535555481 has 4 divisors (see below), whose sum is σ = 1940600793600. Its totient is φ = 1940470317364.

The previous prime is 1940535555467. The next prime is 1940535555499. The reversal of 1940535555481 is 1845555350491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1940535555481 - 2¹⁷ = 1940535424409 is a prime.

It is a super-2 number, since 2×1940535555481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1940535552481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32574421 + ... + 32633938.

It is an arithmetic number, because the mean of its divisors is an integer number (485150198400).

Almost surely, 2^{1940535555481} is an apocalyptic number.

It is an amenable number.

1940535555481 is a deficient number, since it is larger than the sum of its proper divisors (65238119).

1940535555481 is an equidigital number, since it uses as much as digits as its factorization.

1940535555481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65238118.

The product of its (nonzero) digits is 10800000, while the sum is 55.

The spelling of 1940535555481 in words is "one trillion, nine hundred forty billion, five hundred thirty-five million, five hundred fifty-five thousand, four hundred eighty-one".