653401940444 has 24 divisors (see below), whose sum is σ = 1247775127536. Its totient is φ = 296912448000.

The previous prime is 653401940363. The next prime is 653401940459. The reversal of 653401940444 is 444049104356.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 653401940395 and 653401940404.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2061287 + ... + 2357054.

It is an arithmetic number, because the mean of its divisors is an integer number (51990630314).

Almost surely, 2^653401940444 is an apocalyptic number.

It is an amenable number.

653401940444 is a deficient number, since it is larger than the sum of its proper divisors (594373187092).

653401940444 is a wasteful number, since it uses less digits than its factorization.

653401940444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4421717 (or 4421715 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 653401940444 in words is "six hundred fifty-three billion, four hundred one million, nine hundred forty thousand, four hundred forty-four".