1578540668064 has 96 divisors (see below), whose sum is σ = 4302882186624. Its totient is φ = 506314321920.

The previous prime is 1578540668039. The next prime is 1578540668077. The reversal of 1578540668064 is 4608660458751.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1578540667989 and 1578540668007.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2459604 + ... + 3034259.

It is an arithmetic number, because the mean of its divisors is an integer number (44821689444).

Almost surely, 2^{1578540668064} is an apocalyptic number.

It is an amenable number.

1578540668064 is an abundant number, since it is smaller than the sum of its proper divisors (2724341518560).

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

1578540668064 is a wasteful number, since it uses less digits than its factorization.

1578540668064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5493990 (or 5493982 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 1578540668064 in words is "one trillion, five hundred seventy-eight billion, five hundred forty million, six hundred sixty-eight thousand, sixty-four".