1553450553 has 6 divisors (see below), whose sum is σ = 2243873034. Its totient is φ = 1035633696.

The previous prime is 1553450539. The next prime is 1553450557. The reversal of 1553450553 is 3550543551.

1553450553 is a `hidden beast` number, since 1 + 5 + 53 + 4 + 50 + 553 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1543546944 + 9903609 = 39288^2 + 3147^2 .

It is not a de Polignac number, because 1553450553 - 2⁴ = 1553450537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553450557) 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 5 ways as a sum of consecutive naturals, for example, 86302800 + ... + 86302817.

It is an arithmetic number, because the mean of its divisors is an integer number (373978839).

Almost surely, 2^1553450553 is an apocalyptic number.

It is an amenable number.

1553450553 is a deficient number, since it is larger than the sum of its proper divisors (690422481).

1553450553 is a wasteful number, since it uses less digits than its factorization.

1553450553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172605623 (or 172605620 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 36.

The square root of 1553450553 is about 39413.8370753217. The cubic root of 1553450553 is about 1158.1526662978.

The spelling of 1553450553 in words is "one billion, five hundred fifty-three million, four hundred fifty thousand, five hundred fifty-three".