461778321 has 8 divisors (see below), whose sum is σ = 615815200. Its totient is φ = 307796832.

The previous prime is 461778319. The next prime is 461778329. The reversal of 461778321 is 123877164.

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

It is not a de Polignac number, because 461778321 - 2¹ = 461778319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 461778321.

It is not an unprimeable number, because it can be changed into a prime (461778329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13101 + ... + 33093.

It is an arithmetic number, because the mean of its divisors is an integer number (76976900).

Almost surely, 2^461778321 is an apocalyptic number.

It is an amenable number.

461778321 is a deficient number, since it is larger than the sum of its proper divisors (154036879).

461778321 is a wasteful number, since it uses less digits than its factorization.

461778321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27695.

The product of its digits is 56448, while the sum is 39.

The square root of 461778321 is about 21489.0279212439. The cubic root of 461778321 is about 772.9377408245.

The spelling of 461778321 in words is "four hundred sixty-one million, seven hundred seventy-eight thousand, three hundred twenty-one".