405269721623 has 8 divisors (see below), whose sum is σ = 451494120000. Its totient is φ = 361195295328.

The previous prime is 405269721611. The next prime is 405269721641. The reversal of 405269721623 is 326127962504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405269721623 - 2³⁴ = 388089852439 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 (405269721223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537492623 + ... + 537493376.

It is an arithmetic number, because the mean of its divisors is an integer number (56436765000).

Almost surely, 2^405269721623 is an apocalyptic number.

405269721623 is a deficient number, since it is larger than the sum of its proper divisors (46224398377).

405269721623 is a wasteful number, since it uses less digits than its factorization.

405269721623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074986041.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 405269721623 in words is "four hundred five billion, two hundred sixty-nine million, seven hundred twenty-one thousand, six hundred twenty-three".