406813780378 has 8 divisors (see below), whose sum is σ = 611022539700. Its totient is φ = 203139600480.

The previous prime is 406813780367. The next prime is 406813780393. The reversal of 406813780378 is 873087318604.

It can be written as a sum of positive squares in 2 ways, for example, as 287399993409 + 119413786969 = 536097^2 + 345563^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133642953 + ... + 133645996.

Almost surely, 2^406813780378 is an apocalyptic number.

406813780378 is a deficient number, since it is larger than the sum of its proper divisors (204208759322).

406813780378 is a wasteful number, since it uses less digits than its factorization.

406813780378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267289712.

The product of its (nonzero) digits is 5419008, while the sum is 55.

The spelling of 406813780378 in words is "four hundred six billion, eight hundred thirteen million, seven hundred eighty thousand, three hundred seventy-eight".