405791998966620 has 120 divisors (see below), whose sum is σ = 1454839463002464. Its totient is φ = 92752456904064.

The previous prime is 405791998966603. The next prime is 405791998966661. The reversal of 405791998966620 is 26669899197504.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 405791998966620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17892052107 + ... + 17892074786.

Almost surely, 2^{405791998966620} is an apocalyptic number.

It is an amenable number.

405791998966620 is an abundant number, since it is smaller than the sum of its proper divisors (1049047464035844).

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

405791998966620 is a wasteful number, since it uses less digits than its factorization.

405791998966620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35784126921 (or 35784126910 counting only the distinct ones).

The product of its (nonzero) digits is 3174474240, while the sum is 81.

The spelling of 405791998966620 in words is "four hundred five trillion, seven hundred ninety-one billion, nine hundred ninety-eight million, nine hundred sixty-six thousand, six hundred twenty".