63354425621 has 4 divisors (see below), whose sum is σ = 63359447712. Its totient is φ = 63349403532.

The previous prime is 63354425609. The next prime is 63354425647. The reversal of 63354425621 is 12652445336.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63354425621 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 (63354425921) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2492075 + ... + 2517368.

It is an arithmetic number, because the mean of its divisors is an integer number (15839861928).

Almost surely, 2^63354425621 is an apocalyptic number.

It is an amenable number.

63354425621 is a deficient number, since it is larger than the sum of its proper divisors (5022091).

63354425621 is a wasteful number, since it uses less digits than its factorization.

63354425621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022090.

The product of its digits is 518400, while the sum is 41.

The spelling of 63354425621 in words is "sixty-three billion, three hundred fifty-four million, four hundred twenty-five thousand, six hundred twenty-one".