31626430066405 has 8 divisors (see below), whose sum is σ = 37992047345784. Its totient is φ = 25274256542400.

The previous prime is 31626430066379. The next prime is 31626430066457. The reversal of 31626430066405 is 50466003462613.

It can be written as a sum of positive squares in 4 ways, for example, as 351469936801 + 31274960129604 = 592849^2 + 5592402^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31626430066405 - 2¹³ = 31626430058213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360933666 + ... + 3360943075.

It is an arithmetic number, because the mean of its divisors is an integer number (4749005918223).

Almost surely, 2^{31626430066405} is an apocalyptic number.

It is an amenable number.

31626430066405 is a deficient number, since it is larger than the sum of its proper divisors (6365617279379).

31626430066405 is an equidigital number, since it uses as much as digits as its factorization.

31626430066405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721877687.

The product of its (nonzero) digits is 1866240, while the sum is 46.

The spelling of 31626430066405 in words is "thirty-one trillion, six hundred twenty-six billion, four hundred thirty million, sixty-six thousand, four hundred five".