405365609940 has 24 divisors (see below), whose sum is σ = 1135023708000. Its totient is φ = 108097495968.

The previous prime is 405365609927. The next prime is 405365609941. The reversal of 405365609940 is 49906563504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405365609941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3378046690 + ... + 3378046809.

It is an arithmetic number, because the mean of its divisors is an integer number (47292654500).

Almost surely, 2^405365609940 is an apocalyptic number.

It is an amenable number.

405365609940 is an abundant number, since it is smaller than the sum of its proper divisors (729658098060).

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

405365609940 is a wasteful number, since it uses less digits than its factorization.

405365609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756093511 (or 6756093509 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 405365609940 in words is "four hundred five billion, three hundred sixty-five million, six hundred nine thousand, nine hundred forty".