8478781401 has 8 divisors (see below), whose sum is σ = 11320989760. Its totient is φ = 5644546992.

The previous prime is 8478781373. The next prime is 8478781403. The reversal of 8478781401 is 1041878748.

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

It is not a de Polignac number, because 8478781401 - 2¹⁵ = 8478748633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8478781403) 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, 1991005 + ... + 1995258.

It is an arithmetic number, because the mean of its divisors is an integer number (1415123720).

Almost surely, 2^8478781401 is an apocalyptic number.

It is an amenable number.

8478781401 is a deficient number, since it is larger than the sum of its proper divisors (2842208359).

8478781401 is a wasteful number, since it uses less digits than its factorization.

8478781401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986975.

The product of its (nonzero) digits is 401408, while the sum is 48.

The square root of 8478781401 is about 92080.2986582906. The cubic root of 8478781401 is about 2039.1279594130.

The spelling of 8478781401 in words is "eight billion, four hundred seventy-eight million, seven hundred eighty-one thousand, four hundred one".