1553485857 has 96 divisors (see below), whose sum is σ = 2874507264. Its totient is φ = 734630400.

The previous prime is 1553485853. The next prime is 1553485873. The reversal of 1553485857 is 7585843551.

It is not a de Polignac number, because 1553485857 - 2² = 1553485853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1553485853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 851248 + ... + 853070.

It is an arithmetic number, because the mean of its divisors is an integer number (29942784).

Almost surely, 2^1553485857 is an apocalyptic number.

1553485857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1553485857 is a deficient number, since it is larger than the sum of its proper divisors (1321021407).

1553485857 is a wasteful number, since it uses less digits than its factorization.

1553485857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899 (or 1892 counting only the distinct ones).

The product of its digits is 3360000, while the sum is 51.

The square root of 1553485857 is about 39414.2849357945. The cubic root of 1553485857 is about 1158.1614396941.

The spelling of 1553485857 in words is "one billion, five hundred fifty-three million, four hundred eighty-five thousand, eight hundred fifty-seven".