1478891481457 has 8 divisors (see below), whose sum is σ = 1592830023680. Its totient is φ = 1364978319120.

The previous prime is 1478891481439. The next prime is 1478891481461. The reversal of 1478891481457 is 7541841988741.

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

It is not a de Polignac number, because 1478891481457 - 2¹⁵ = 1478891448689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1478891481392 and 1478891481401.

It is not an unprimeable number, because it can be changed into a prime (1478891401457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6223857 + ... + 6457102.

It is an arithmetic number, because the mean of its divisors is an integer number (199103752960).

Almost surely, 2^{1478891481457} is an apocalyptic number.

It is an amenable number.

1478891481457 is a deficient number, since it is larger than the sum of its proper divisors (113938542223).

1478891481457 is a wasteful number, since it uses less digits than its factorization.

1478891481457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12689943.

The product of its digits is 72253440, while the sum is 67.

The spelling of 1478891481457 in words is "one trillion, four hundred seventy-eight billion, eight hundred ninety-one million, four hundred eighty-one thousand, four hundred fifty-seven".