406390404425 has 6 divisors (see below), whose sum is σ = 503924101518. Its totient is φ = 325112323520.

The previous prime is 406390404401. The next prime is 406390404479. The reversal of 406390404425 is 524404093604.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29472992329 + 376917412096 = 171677^2 + 613936^2 .

It is a de Polignac number, because none of the positive numbers 2^k-406390404425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8127808064 + ... + 8127808113.

It is an arithmetic number, because the mean of its divisors is an integer number (83987350253).

Almost surely, 2^406390404425 is an apocalyptic number.

It is an amenable number.

406390404425 is a deficient number, since it is larger than the sum of its proper divisors (97533697093).

406390404425 is a wasteful number, since it uses less digits than its factorization.

406390404425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16255616187 (or 16255616182 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 406390404425 in words is "four hundred six billion, three hundred ninety million, four hundred four thousand, four hundred twenty-five".