1868642880720 has 320 divisors, whose sum is σ = 7536193081344. Its totient is φ = 371407196160.

The previous prime is 1868642880649. The next prime is 1868642880733. The reversal of 1868642880720 is 270882468681.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1773157 + ... + 2623236.

Almost surely, 2^{1868642880720} is an apocalyptic number.

1868642880720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1868642880720 is an abundant number, since it is smaller than the sum of its proper divisors (5667550200624).

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

1868642880720 is a wasteful number, since it uses less digits than its factorization.

1868642880720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396450 (or 4396444 counting only the distinct ones).

The product of its (nonzero) digits is 16515072, while the sum is 60.

The spelling of 1868642880720 in words is "one trillion, eight hundred sixty-eight billion, six hundred forty-two million, eight hundred eighty thousand, seven hundred twenty".