1553381061 has 16 divisors (see below), whose sum is σ = 2174183424. Its totient is φ = 984623024.

The previous prime is 1553381059. The next prime is 1553381083. The reversal of 1553381061 is 1601833551.

It is a cyclic number.

It is not a de Polignac number, because 1553381061 - 2¹ = 1553381059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553381561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55881 + ... + 78926.

It is an arithmetic number, because the mean of its divisors is an integer number (135886464).

Almost surely, 2^1553381061 is an apocalyptic number.

It is an amenable number.

1553381061 is a deficient number, since it is larger than the sum of its proper divisors (620802363).

1553381061 is a wasteful number, since it uses less digits than its factorization.

1553381061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135000.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1553381061 is about 39412.9554968921. The cubic root of 1553381061 is about 1158.1353964540.

The spelling of 1553381061 in words is "one billion, five hundred fifty-three million, three hundred eighty-one thousand, sixty-one".