405269721996 has 24 divisors (see below), whose sum is σ = 954304853040. Its totient is φ = 133850549952.

The previous prime is 405269721959. The next prime is 405269722043. The reversal of 405269721996 is 699127962504.

It is an unprimeable number.

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, 154918311 + ... + 154920926.

It is an arithmetic number, because the mean of its divisors is an integer number (39762702210).

Almost surely, 2^405269721996 is an apocalyptic number.

It is an amenable number.

405269721996 is an abundant number, since it is smaller than the sum of its proper divisors (549035131044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405269721996 is a wasteful number, since it uses less digits than its factorization.

405269721996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309839353 (or 309839351 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 405269721996 in words is "four hundred five billion, two hundred sixty-nine million, seven hundred twenty-one thousand, nine hundred ninety-six".