63723328405 has 16 divisors (see below), whose sum is σ = 83979504000. Its totient is φ = 46033197760.

The previous prime is 63723328381. The next prime is 63723328421. The reversal of 63723328405 is 50482332736.

It is not a de Polignac number, because 63723328405 - 2⁹ = 63723327893 is a prime.

It is a super-2 number, since 2×63723328405² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 3879745 + ... + 3896134.

It is an arithmetic number, because the mean of its divisors is an integer number (5248719000).

Almost surely, 2^63723328405 is an apocalyptic number.

It is an amenable number.

63723328405 is a deficient number, since it is larger than the sum of its proper divisors (20256175595).

63723328405 is a wasteful number, since it uses less digits than its factorization.

63723328405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776044.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 63723328405 in words is "sixty-three billion, seven hundred twenty-three million, three hundred twenty-eight thousand, four hundred five".