1578360206640 has 80 divisors (see below), whose sum is σ = 5591904738048. Its totient is φ = 360768046848.

The previous prime is 1578360206623. The next prime is 1578360206659. The reversal of 1578360206640 is 466020638751.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1578360206640.

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, 469748382 + ... + 469751741.

Almost surely, 2^{1578360206640} is an apocalyptic number.

1578360206640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1578360206640 is an abundant number, since it is smaller than the sum of its proper divisors (4013544531408).

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

1578360206640 is a wasteful number, since it uses less digits than its factorization.

1578360206640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939500146 (or 939500140 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 1578360206640 in words is "one trillion, five hundred seventy-eight billion, three hundred sixty million, two hundred six thousand, six hundred forty".