1225678144578 has 8 divisors (see below), whose sum is σ = 2451356289168. Its totient is φ = 408559381524.

The previous prime is 1225678144577. The next prime is 1225678144597. The reversal of 1225678144578 is 8754418765221.

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

1225678144578 is an admirable number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1225678144577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102139845376 + ... + 102139845387.

It is an arithmetic number, because the mean of its divisors is an integer number (306419536146).

Almost surely, 2^{1225678144578} is an apocalyptic number.

1225678144578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225678144578 is a wasteful number, since it uses less digits than its factorization.

1225678144578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204279690768.

The product of its digits is 30105600, while the sum is 60.

The spelling of 1225678144578 in words is "one trillion, two hundred twenty-five billion, six hundred seventy-eight million, one hundred forty-four thousand, five hundred seventy-eight".