653421663111 has 16 divisors (see below), whose sum is σ = 995704985600. Its totient is φ = 373378245408.

The previous prime is 653421663091. The next prime is 653421663149. The reversal of 653421663111 is 111366124356.

653421663111 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 653421663111 - 2¹⁰ = 653421662087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 653421663111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653421663161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1519185 + ... + 1901253.

It is an arithmetic number, because the mean of its divisors is an integer number (62231561600).

Almost surely, 2^653421663111 is an apocalyptic number.

653421663111 is a deficient number, since it is larger than the sum of its proper divisors (342283322489).

653421663111 is a wasteful number, since it uses less digits than its factorization.

653421663111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463518.

The product of its digits is 77760, while the sum is 39.

Adding to 653421663111 its reverse (111366124356), we get a palindrome (764787787467).

The spelling of 653421663111 in words is "six hundred fifty-three billion, four hundred twenty-one million, six hundred sixty-three thousand, one hundred eleven".