405736420574421 has 6 divisors (see below), whose sum is σ = 586063718607510. Its totient is φ = 270490947049608.

The previous prime is 405736420574399. The next prime is 405736420574489. The reversal of 405736420574421 is 124475024637504.

405736420574421 is a `hidden beast` number, since 4 + 0 + 5 + 7 + 3 + 6 + 4 + 20 + 574 + 42 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 301650515511921 + 104085905062500 = 17368089^2 + 10202250^2 .

It is not a de Polignac number, because 405736420574421 - 2⁹ = 405736420573909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405736420579421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22540912254126 + ... + 22540912254143.

It is an arithmetic number, because the mean of its divisors is an integer number (97677286434585).

Almost surely, 2^{405736420574421} is an apocalyptic number.

It is an amenable number.

405736420574421 is a deficient number, since it is larger than the sum of its proper divisors (180327298033089).

405736420574421 is a wasteful number, since it uses less digits than its factorization.

405736420574421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45081824508275 (or 45081824508272 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 54.

The spelling of 405736420574421 in words is "four hundred five trillion, seven hundred thirty-six billion, four hundred twenty million, five hundred seventy-four thousand, four hundred twenty-one".