1555540541 has 8 divisors (see below), whose sum is σ = 1633199520. Its totient is φ = 1479482928.

The previous prime is 1555540501. The next prime is 1555540561. The reversal of 1555540541 is 1450455551.

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 1555540541 - 2²⁶ = 1488431677 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 (1555540501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398351 + ... + 402236.

It is an arithmetic number, because the mean of its divisors is an integer number (204149940).

Almost surely, 2^1555540541 is an apocalyptic number.

It is an amenable number.

1555540541 is a deficient number, since it is larger than the sum of its proper divisors (77658979).

1555540541 is an equidigital number, since it uses as much as digits as its factorization.

1555540541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800683.

The product of its (nonzero) digits is 50000, while the sum is 35.

The square root of 1555540541 is about 39440.3415426388. The cubic root of 1555540541 is about 1158.6718203553.

The spelling of 1555540541 in words is "one billion, five hundred fifty-five million, five hundred forty thousand, five hundred forty-one".