1864628640000 has 1440 divisors, whose sum is σ = 7939931408640. Its totient is φ = 422682624000.

The previous prime is 1864628639971. The next prime is 1864628640041. The reversal of 1864628640000 is 468264681.

1864628640000 is a `hidden beast` number, since 18 + 6 + 4 + 628 + 6 + 4 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5957279844 + ... + 5957280156.

It is an arithmetic number, because the mean of its divisors is an integer number (5513841256).

Almost surely, 2^{1864628640000} is an apocalyptic number.

1864628640000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1864628640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3969965704320).

1864628640000 is an abundant number, since it is smaller than the sum of its proper divisors (6075302768640).

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

1864628640000 is an equidigital number, since it uses as much as digits as its factorization.

1864628640000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 1864628640000 in words is "one trillion, eight hundred sixty-four billion, six hundred twenty-eight million, six hundred forty thousand".