1405665650052 has 144 divisors (see below), whose sum is σ = 3608558553600. Its totient is φ = 461306926080.

The previous prime is 1405665650033. The next prime is 1405665650069. The reversal of 1405665650052 is 2500565665041.

1405665650052 is a `hidden beast` number, since 1 + 40 + 5 + 6 + 6 + 56 + 500 + 52 = 666.

It is a super-2 number, since 2×1405665650052² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1281371968 + ... + 1281373064.

It is an arithmetic number, because the mean of its divisors is an integer number (25059434400).

Almost surely, 2^{1405665650052} is an apocalyptic number.

1405665650052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1405665650052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804279276800).

1405665650052 is an abundant number, since it is smaller than the sum of its proper divisors (2202892903548).

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

1405665650052 is a wasteful number, since it uses less digits than its factorization.

1405665650052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 1405665650052 in words is "one trillion, four hundred five billion, six hundred sixty-five million, six hundred fifty thousand, fifty-two".