1642857285880 has 16 divisors (see below), whose sum is σ = 3696428893320. Its totient is φ = 657142914336.

The previous prime is 1642857285863. The next prime is 1642857285967. The reversal of 1642857285880 is 885827582461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20535716034 + ... + 20535716113.

Almost surely, 2^{1642857285880} is an apocalyptic number.

1642857285880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642857285880 is an abundant number, since it is smaller than the sum of its proper divisors (2053571607440).

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

1642857285880 is a wasteful number, since it uses less digits than its factorization.

1642857285880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41071432158 (or 41071432154 counting only the distinct ones).

The product of its (nonzero) digits is 68812800, while the sum is 64.

The spelling of 1642857285880 in words is "one trillion, six hundred forty-two billion, eight hundred fifty-seven million, two hundred eighty-five thousand, eight hundred eighty".