1553638490 has 32 divisors (see below), whose sum is σ = 2839968000. Its totient is φ = 611851968.

The previous prime is 1553638453. The next prime is 1553638511. The reversal of 1553638490 is 948363551.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296816 + ... + 302004.

It is an arithmetic number, because the mean of its divisors is an integer number (88749000).

Almost surely, 2^1553638490 is an apocalyptic number.

1553638490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1553638490 is a deficient number, since it is larger than the sum of its proper divisors (1286329510).

1553638490 is a wasteful number, since it uses less digits than its factorization.

1553638490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5654.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 1553638490 is about 39416.2211532257. The cubic root of 1553638490 is about 1158.1993689882.

The spelling of 1553638490 in words is "one billion, five hundred fifty-three million, six hundred thirty-eight thousand, four hundred ninety".