840527406405 has 24 divisors (see below), whose sum is σ = 1459187098200. Its totient is φ = 447581921280.

The previous prime is 840527406379. The next prime is 840527406419. The reversal of 840527406405 is 504604725048.

840527406405 is a `hidden beast` number, since 8 + 40 + 527 + 40 + 6 + 40 + 5 = 666.

840527406405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 391242744036 + 449284662369 = 625494^2 + 670287^2 .

It is not a de Polignac number, because 840527406405 - 2¹¹ = 840527404357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14540880 + ... + 14598569.

It is an arithmetic number, because the mean of its divisors is an integer number (60799462425).

Almost surely, 2^840527406405 is an apocalyptic number.

It is an amenable number.

840527406405 is a deficient number, since it is larger than the sum of its proper divisors (618659691795).

840527406405 is a wasteful number, since it uses less digits than its factorization.

840527406405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29140101 (or 29140098 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 45.

The spelling of 840527406405 in words is "eight hundred forty billion, five hundred twenty-seven million, four hundred six thousand, four hundred five".