1798063653 has 4 divisors (see below), whose sum is σ = 2397418208. Its totient is φ = 1198709100.

The previous prime is 1798063649. The next prime is 1798063661. The reversal of 1798063653 is 3563608971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1798063653 - 2² = 1798063649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798063693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299677273 + ... + 299677278.

It is an arithmetic number, because the mean of its divisors is an integer number (599354552).

Almost surely, 2^1798063653 is an apocalyptic number.

It is an amenable number.

1798063653 is a deficient number, since it is larger than the sum of its proper divisors (599354555).

1798063653 is an equidigital number, since it uses as much as digits as its factorization.

1798063653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599354554.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 1798063653 is about 42403.5806624865. The cubic root of 1798063653 is about 1216.0040480320.

The spelling of 1798063653 in words is "one billion, seven hundred ninety-eight million, sixty-three thousand, six hundred fifty-three".