405521451427 has 2 divisors, whose sum is σ = 405521451428. Its totient is φ = 405521451426.

The previous prime is 405521451359. The next prime is 405521451457. The reversal of 405521451427 is 724154125504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405521451427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405521451427.

It is not a weakly prime, because it can be changed into another prime (405521451457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202760725713 + 202760725714.

It is an arithmetic number, because the mean of its divisors is an integer number (202760725714).

Almost surely, 2^405521451427 is an apocalyptic number.

405521451427 is a deficient number, since it is larger than the sum of its proper divisors (1).

405521451427 is an equidigital number, since it uses as much as digits as its factorization.

405521451427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224000, while the sum is 40.

The spelling of 405521451427 in words is "four hundred five billion, five hundred twenty-one million, four hundred fifty-one thousand, four hundred twenty-seven".