1553149855 has 4 divisors (see below), whose sum is σ = 1863779832. Its totient is φ = 1242519880.

The previous prime is 1553149841. The next prime is 1553149883. The reversal of 1553149855 is 5589413551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5589413551 = 46919 ⋅119129.

It is not a de Polignac number, because 1553149855 - 2¹³ = 1553141663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 155314981 + ... + 155314990.

It is an arithmetic number, because the mean of its divisors is an integer number (465944958).

Almost surely, 2^1553149855 is an apocalyptic number.

1553149855 is a deficient number, since it is larger than the sum of its proper divisors (310629977).

1553149855 is an equidigital number, since it uses as much as digits as its factorization.

1553149855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310629976.

The product of its digits is 540000, while the sum is 46.

The square root of 1553149855 is about 39410.0222659161. The cubic root of 1553149855 is about 1158.0779344559.

The spelling of 1553149855 in words is "one billion, five hundred fifty-three million, one hundred forty-nine thousand, eight hundred fifty-five".